diff --git a/compiled_starters/cpp/src/Server.cpp b/compiled_starters/cpp/src/Server.cpp
index 8510ded..fe12d64 100644
--- a/compiled_starters/cpp/src/Server.cpp
+++ b/compiled_starters/cpp/src/Server.cpp
@@ -16,7 +16,7 @@ int main(int argc, char* argv[]) {
     std::cerr << std::unitbuf;
 
     // You can use print statements as follows for debugging, they'll be visible when running tests.
-    std::cout << "Logs from your program will appear here" << std::endl;
+    std::cerr << "Logs from your program will appear here" << std::endl;
 
     if (argc != 3) {
         std::cerr << "Expected two arguments" << std::endl;
diff --git a/compiled_starters/csharp/src/Program.cs b/compiled_starters/csharp/src/Program.cs
index a973848..45ae00e 100644
--- a/compiled_starters/csharp/src/Program.cs
+++ b/compiled_starters/csharp/src/Program.cs
@@ -23,7 +23,7 @@ static bool MatchPattern(string inputLine, string pattern)
 string inputLine = Console.In.ReadToEnd();
 
 // You can use print statements as follows for debugging, they'll be visible when running tests.
-Console.WriteLine("Logs from your program will appear here!");
+Console.Error.WriteLine("Logs from your program will appear here!");
 
 // Uncomment this block to pass the first stage
 // 
diff --git a/compiled_starters/gleam/src/main.gleam b/compiled_starters/gleam/src/main.gleam
index d4b93cc..9d37833 100644
--- a/compiled_starters/gleam/src/main.gleam
+++ b/compiled_starters/gleam/src/main.gleam
@@ -5,7 +5,7 @@ import gleam/string
 
 pub fn main() {
   // You can use print statements as follows for debugging, they'll be visible when running tests.
-  io.println("Logs from your program will appear here!")
+  io.print_error("Logs from your program will appear here!")
 
   let args = argv.load().arguments
   let assert Ok(input_line) = erlang.get_line("")
diff --git a/compiled_starters/go/cmd/mygrep/main.go b/compiled_starters/go/cmd/mygrep/main.go
index caaeeb0..99df5d9 100644
--- a/compiled_starters/go/cmd/mygrep/main.go
+++ b/compiled_starters/go/cmd/mygrep/main.go
@@ -47,7 +47,7 @@ func matchLine(line []byte, pattern string) (bool, error) {
 	var ok bool
 
 	// You can use print statements as follows for debugging, they'll be visible when running tests.
-	fmt.Println("Logs from your program will appear here!")
+	fmt.Fprintln(os.Stderr, "Logs from your program will appear here!")
 
 	// Uncomment this to pass the first stage
 	// ok = bytes.ContainsAny(line, pattern)
diff --git a/compiled_starters/haskell/app/Main.hs b/compiled_starters/haskell/app/Main.hs
index 1c1dd8f..64ef174 100644
--- a/compiled_starters/haskell/app/Main.hs
+++ b/compiled_starters/haskell/app/Main.hs
@@ -16,7 +16,7 @@ main = do
   input_line <- getLine
 
   -- You can use print statements as follows for debugging, they'll be visible when running tests.
-  putStrLn "Logs from your program will appear here"
+  hPutStrLn stderr "Logs from your program will appear here"
 
   -- Uncomment this block to pass stage 1
   -- if head args /= "-E"
diff --git a/compiled_starters/javascript/app/main.js b/compiled_starters/javascript/app/main.js
index 80934cf..ba2e737 100644
--- a/compiled_starters/javascript/app/main.js
+++ b/compiled_starters/javascript/app/main.js
@@ -16,7 +16,7 @@ function main() {
   }
 
   // You can use print statements as follows for debugging, they'll be visible when running tests.
-  console.log("Logs from your program will appear here");
+  console.error("Logs from your program will appear here");
 
   // Uncomment this block to pass the first stage
   // if (matchPattern(inputLine, pattern)) {
diff --git a/compiled_starters/python/app/main.py b/compiled_starters/python/app/main.py
index 18b06a1..3c5d3de 100644
--- a/compiled_starters/python/app/main.py
+++ b/compiled_starters/python/app/main.py
@@ -20,7 +20,7 @@ def main():
         exit(1)
 
     # You can use print statements as follows for debugging, they'll be visible when running tests.
-    print("Logs from your program will appear here!")
+    print("Logs from your program will appear here!", file=sys.stderr)
 
     # Uncomment this block to pass the first stage
     # if match_pattern(input_line, pattern):
diff --git a/compiled_starters/ruby/app/main.rb b/compiled_starters/ruby/app/main.rb
index 371eb53..8813b4e 100644
--- a/compiled_starters/ruby/app/main.rb
+++ b/compiled_starters/ruby/app/main.rb
@@ -16,7 +16,7 @@ def main
   end
 
   # You can use print statements as follows for debugging, they'll be visible when running tests.
-  puts "Logs from your program will appear here"
+  warn "Logs from your program will appear here"
   
   # Uncomment this block to pass the first stage
   # if match_pattern(input_line, pattern)
diff --git a/compiled_starters/rust/src/main.rs b/compiled_starters/rust/src/main.rs
index 44cd655..76fa3f0 100644
--- a/compiled_starters/rust/src/main.rs
+++ b/compiled_starters/rust/src/main.rs
@@ -13,7 +13,7 @@ fn match_pattern(input_line: &str, pattern: &str) -> bool {
 // Usage: echo <input_text> | your_program.sh -E <pattern>
 fn main() {
     // You can use print statements as follows for debugging, they'll be visible when running tests.
-    println!("Logs from your program will appear here!");
+    eprintln!("Logs from your program will appear here!");
 
     if env::args().nth(1).unwrap() != "-E" {
         println!("Expected first argument to be '-E'");
diff --git a/compiled_starters/typescript/app/main.ts b/compiled_starters/typescript/app/main.ts
index ab6bb3b..b7c9c0d 100644
--- a/compiled_starters/typescript/app/main.ts
+++ b/compiled_starters/typescript/app/main.ts
@@ -17,7 +17,7 @@ if (args[2] !== "-E") {
 }
 
 // You can use print statements as follows for debugging, they'll be visible when running tests.
-console.log("Logs from your program will appear here!");
+console.error("Logs from your program will appear here!");
 
 // Uncomment this block to pass the first stage
 // if (matchPattern(inputLine, pattern)) {
diff --git a/solutions/cpp/01-cq2/diff/src/Server.cpp.diff b/solutions/cpp/01-cq2/diff/src/Server.cpp.diff
index 17dc2de..07b557f 100644
--- a/solutions/cpp/01-cq2/diff/src/Server.cpp.diff
+++ b/solutions/cpp/01-cq2/diff/src/Server.cpp.diff
@@ -17,7 +17,7 @@
      std::cerr << std::unitbuf;
 
 -    // You can use print statements as follows for debugging, they'll be visible when running tests.
--    std::cout << "Logs from your program will appear here" << std::endl;
+-    std::cerr << "Logs from your program will appear here" << std::endl;
 -
      if (argc != 3) {
          std::cerr << "Expected two arguments" << std::endl;
diff --git a/solutions/csharp/01-cq2/diff/src/Program.cs.diff b/solutions/csharp/01-cq2/diff/src/Program.cs.diff
index 34d9983..d5fb90d 100644
--- a/solutions/csharp/01-cq2/diff/src/Program.cs.diff
+++ b/solutions/csharp/01-cq2/diff/src/Program.cs.diff
@@ -24,7 +24,7 @@
  string inputLine = Console.In.ReadToEnd();
 
 -// You can use print statements as follows for debugging, they'll be visible when running tests.
--Console.WriteLine("Logs from your program will appear here!");
+-Console.Error.WriteLine("Logs from your program will appear here!");
 -
 -// Uncomment this block to pass the first stage
 -// 
diff --git a/solutions/gleam/01-cq2/diff/src/main.gleam.diff b/solutions/gleam/01-cq2/diff/src/main.gleam.diff
index 9ae8877..b6873c7 100644
--- a/solutions/gleam/01-cq2/diff/src/main.gleam.diff
+++ b/solutions/gleam/01-cq2/diff/src/main.gleam.diff
@@ -6,7 +6,7 @@
 
  pub fn main() {
 -  // You can use print statements as follows for debugging, they'll be visible when running tests.
--  io.println("Logs from your program will appear here!")
+-  io.print_error("Logs from your program will appear here!")
 -
    let args = argv.load().arguments
    let assert Ok(input_line) = erlang.get_line("")
diff --git a/solutions/go/01-cq2/diff/cmd/mygrep/main.go.diff b/solutions/go/01-cq2/diff/cmd/mygrep/main.go.diff
index 6739228..97b2c6b 100644
--- a/solutions/go/01-cq2/diff/cmd/mygrep/main.go.diff
+++ b/solutions/go/01-cq2/diff/cmd/mygrep/main.go.diff
@@ -25,7 +25,7 @@
  	var ok bool
 
 -	// You can use print statements as follows for debugging, they'll be visible when running tests.
--	fmt.Println("Logs from your program will appear here!")
+-	fmt.Fprintln(os.Stderr, "Logs from your program will appear here!")
 -
 -	// Uncomment this to pass the first stage
 -	// ok = bytes.ContainsAny(line, pattern)
diff --git a/solutions/haskell/01-cq2/diff/app/Main.hs.diff b/solutions/haskell/01-cq2/diff/app/Main.hs.diff
index 50c1edf..eab09c8 100644
--- a/solutions/haskell/01-cq2/diff/app/Main.hs.diff
+++ b/solutions/haskell/01-cq2/diff/app/Main.hs.diff
@@ -17,7 +17,7 @@
    input_line <- getLine
 
 -  -- You can use print statements as follows for debugging, they'll be visible when running tests.
--  putStrLn "Logs from your program will appear here"
+-  hPutStrLn stderr "Logs from your program will appear here"
 -
 -  -- Uncomment this block to pass stage 1
 -  -- if head args /= "-E"
diff --git a/solutions/javascript/01-cq2/diff/app/main.js.diff b/solutions/javascript/01-cq2/diff/app/main.js.diff
index 652bdaa..1a36c3b 100644
--- a/solutions/javascript/01-cq2/diff/app/main.js.diff
+++ b/solutions/javascript/01-cq2/diff/app/main.js.diff
@@ -17,7 +17,7 @@
    }
 
 -  // You can use print statements as follows for debugging, they'll be visible when running tests.
--  console.log("Logs from your program will appear here");
+-  console.error("Logs from your program will appear here");
 -
 -  // Uncomment this block to pass the first stage
 -  // if (matchPattern(inputLine, pattern)) {
diff --git a/solutions/python/01-cq2/diff/app/main.py.diff b/solutions/python/01-cq2/diff/app/main.py.diff
index dbb343b..4cdbb66 100644
--- a/solutions/python/01-cq2/diff/app/main.py.diff
+++ b/solutions/python/01-cq2/diff/app/main.py.diff
@@ -21,7 +21,7 @@
          exit(1)
 
 -    # You can use print statements as follows for debugging, they'll be visible when running tests.
--    print("Logs from your program will appear here!")
+-    print("Logs from your program will appear here!", file=sys.stderr)
 -
 -    # Uncomment this block to pass the first stage
 -    # if match_pattern(input_line, pattern):
diff --git a/solutions/ruby/01-cq2/diff/app/main.rb.diff b/solutions/ruby/01-cq2/diff/app/main.rb.diff
index 6543509..7aad2c8 100644
--- a/solutions/ruby/01-cq2/diff/app/main.rb.diff
+++ b/solutions/ruby/01-cq2/diff/app/main.rb.diff
@@ -17,7 +17,7 @@
    end
 
 -  # You can use print statements as follows for debugging, they'll be visible when running tests.
--  puts "Logs from your program will appear here"
+-  warn "Logs from your program will appear here"
 -  
 -  # Uncomment this block to pass the first stage
 -  # if match_pattern(input_line, pattern)
diff --git a/solutions/rust/01-cq2/diff/src/main.rs.diff b/solutions/rust/01-cq2/diff/src/main.rs.diff
index fa01b7a..8d8442a 100644
--- a/solutions/rust/01-cq2/diff/src/main.rs.diff
+++ b/solutions/rust/01-cq2/diff/src/main.rs.diff
@@ -14,7 +14,7 @@
  // Usage: echo <input_text> | your_program.sh -E <pattern>
  fn main() {
 -    // You can use print statements as follows for debugging, they'll be visible when running tests.
--    println!("Logs from your program will appear here!");
+-    eprintln!("Logs from your program will appear here!");
 -
      if env::args().nth(1).unwrap() != "-E" {
          println!("Expected first argument to be '-E'");
diff --git a/solutions/typescript/01-cq2/diff/app/main.ts.diff b/solutions/typescript/01-cq2/diff/app/main.ts.diff
index 9604b8e..46c4eed 100644
--- a/solutions/typescript/01-cq2/diff/app/main.ts.diff
+++ b/solutions/typescript/01-cq2/diff/app/main.ts.diff
@@ -18,7 +18,7 @@
  }
 
 -// You can use print statements as follows for debugging, they'll be visible when running tests.
--console.log("Logs from your program will appear here!");
+-console.error("Logs from your program will appear here!");
 -
 -// Uncomment this block to pass the first stage
 -// if (matchPattern(inputLine, pattern)) {
diff --git a/starter_templates/cpp/code/src/Server.cpp b/starter_templates/cpp/code/src/Server.cpp
index 8510ded..fe12d64 100644
--- a/starter_templates/cpp/code/src/Server.cpp
+++ b/starter_templates/cpp/code/src/Server.cpp
@@ -16,7 +16,7 @@ int main(int argc, char* argv[]) {
     std::cerr << std::unitbuf;
 
     // You can use print statements as follows for debugging, they'll be visible when running tests.
-    std::cout << "Logs from your program will appear here" << std::endl;
+    std::cerr << "Logs from your program will appear here" << std::endl;
 
     if (argc != 3) {
         std::cerr << "Expected two arguments" << std::endl;
diff --git a/starter_templates/csharp/code/src/Program.cs b/starter_templates/csharp/code/src/Program.cs
index a973848..45ae00e 100644
--- a/starter_templates/csharp/code/src/Program.cs
+++ b/starter_templates/csharp/code/src/Program.cs
@@ -23,7 +23,7 @@ static bool MatchPattern(string inputLine, string pattern)
 string inputLine = Console.In.ReadToEnd();
 
 // You can use print statements as follows for debugging, they'll be visible when running tests.
-Console.WriteLine("Logs from your program will appear here!");
+Console.Error.WriteLine("Logs from your program will appear here!");
 
 // Uncomment this block to pass the first stage
 // 
diff --git a/starter_templates/gleam/code/src/main.gleam b/starter_templates/gleam/code/src/main.gleam
index d4b93cc..9d37833 100644
--- a/starter_templates/gleam/code/src/main.gleam
+++ b/starter_templates/gleam/code/src/main.gleam
@@ -5,7 +5,7 @@ import gleam/string
 
 pub fn main() {
   // You can use print statements as follows for debugging, they'll be visible when running tests.
-  io.println("Logs from your program will appear here!")
+  io.print_error("Logs from your program will appear here!")
 
   let args = argv.load().arguments
   let assert Ok(input_line) = erlang.get_line("")
diff --git a/starter_templates/go/code/cmd/mygrep/main.go b/starter_templates/go/code/cmd/mygrep/main.go
index caaeeb0..99df5d9 100644
--- a/starter_templates/go/code/cmd/mygrep/main.go
+++ b/starter_templates/go/code/cmd/mygrep/main.go
@@ -47,7 +47,7 @@ func matchLine(line []byte, pattern string) (bool, error) {
 	var ok bool
 
 	// You can use print statements as follows for debugging, they'll be visible when running tests.
-	fmt.Println("Logs from your program will appear here!")
+	fmt.Fprintln(os.Stderr, "Logs from your program will appear here!")
 
 	// Uncomment this to pass the first stage
 	// ok = bytes.ContainsAny(line, pattern)
diff --git a/starter_templates/haskell/code/app/Main.hs b/starter_templates/haskell/code/app/Main.hs
index 1c1dd8f..64ef174 100644
--- a/starter_templates/haskell/code/app/Main.hs
+++ b/starter_templates/haskell/code/app/Main.hs
@@ -16,7 +16,7 @@ main = do
   input_line <- getLine
 
   -- You can use print statements as follows for debugging, they'll be visible when running tests.
-  putStrLn "Logs from your program will appear here"
+  hPutStrLn stderr "Logs from your program will appear here"
 
   -- Uncomment this block to pass stage 1
   -- if head args /= "-E"
diff --git a/starter_templates/javascript/code/app/main.js b/starter_templates/javascript/code/app/main.js
index 80934cf..ba2e737 100644
--- a/starter_templates/javascript/code/app/main.js
+++ b/starter_templates/javascript/code/app/main.js
@@ -16,7 +16,7 @@ function main() {
   }
 
   // You can use print statements as follows for debugging, they'll be visible when running tests.
-  console.log("Logs from your program will appear here");
+  console.error("Logs from your program will appear here");
 
   // Uncomment this block to pass the first stage
   // if (matchPattern(inputLine, pattern)) {
diff --git a/starter_templates/python/code/app/main.py b/starter_templates/python/code/app/main.py
index 18b06a1..3c5d3de 100644
--- a/starter_templates/python/code/app/main.py
+++ b/starter_templates/python/code/app/main.py
@@ -20,7 +20,7 @@ def main():
         exit(1)
 
     # You can use print statements as follows for debugging, they'll be visible when running tests.
-    print("Logs from your program will appear here!")
+    print("Logs from your program will appear here!", file=sys.stderr)
 
     # Uncomment this block to pass the first stage
     # if match_pattern(input_line, pattern):
diff --git a/starter_templates/ruby/code/app/main.rb b/starter_templates/ruby/code/app/main.rb
index 371eb53..8813b4e 100644
--- a/starter_templates/ruby/code/app/main.rb
+++ b/starter_templates/ruby/code/app/main.rb
@@ -16,7 +16,7 @@ def main
   end
 
   # You can use print statements as follows for debugging, they'll be visible when running tests.
-  puts "Logs from your program will appear here"
+  warn "Logs from your program will appear here"
   
   # Uncomment this block to pass the first stage
   # if match_pattern(input_line, pattern)
diff --git a/starter_templates/rust/code/src/main.rs b/starter_templates/rust/code/src/main.rs
index 44cd655..76fa3f0 100644
--- a/starter_templates/rust/code/src/main.rs
+++ b/starter_templates/rust/code/src/main.rs
@@ -13,7 +13,7 @@ fn match_pattern(input_line: &str, pattern: &str) -> bool {
 // Usage: echo <input_text> | your_program.sh -E <pattern>
 fn main() {
     // You can use print statements as follows for debugging, they'll be visible when running tests.
-    println!("Logs from your program will appear here!");
+    eprintln!("Logs from your program will appear here!");
 
     if env::args().nth(1).unwrap() != "-E" {
         println!("Expected first argument to be '-E'");
diff --git a/starter_templates/typescript/code/app/main.ts b/starter_templates/typescript/code/app/main.ts
index ab6bb3b..b7c9c0d 100644
--- a/starter_templates/typescript/code/app/main.ts
+++ b/starter_templates/typescript/code/app/main.ts
@@ -17,7 +17,7 @@ if (args[2] !== "-E") {
 }
 
 // You can use print statements as follows for debugging, they'll be visible when running tests.
-console.log("Logs from your program will appear here!");
+console.error("Logs from your program will appear here!");
 
 // Uncomment this block to pass the first stage
 // if (matchPattern(inputLine, pattern)) {