diff --git a/2024/12/daily.py b/2024/12/daily.py
index e502ef8..4b6cf43 100644
--- a/2024/12/daily.py
+++ b/2024/12/daily.py
@@ -52,6 +52,58 @@ def perimeter(grid, block):
 
   return sum
 
+def sides(grid, block):
+  sum = 0
+
+  min_x = min([x for x, _ in block])
+  max_x = max([x for x, _ in block])
+  min_y = min([y for _, y in block])
+  max_y = max([y for _, y in block])
+
+  # read from left to right
+  # if there's a block and not a block above then there's a side
+  # side_check on, if side_check off, add one to side
+  # if not a block then side_check off
+  # new line reset side_check
+  for y in range(min_y, max_y + 1):
+    up_side_check = False
+    down_side_check = False
+    for x in range(min_x, max_x + 1):
+      if (x, y) in block and (x, y - 1) not in block:
+          if not up_side_check:
+            up_side_check = True
+            sum += 1
+      else:
+        up_side_check = False
+
+      if (x, y) in block and (x, y + 1) not in block:
+          if not down_side_check:
+            down_side_check = True
+            sum += 1
+      else:
+        down_side_check = False
+
+  # Do the same but left and right
+  for x in range(min_x, max_x + 1):
+    right_side_check = False
+    left_side_check = False
+    for y in range(min_y, max_y + 1):
+      if (x, y) in block and (x + 1, y) not in block:
+          if not right_side_check:
+            right_side_check = True
+            sum += 1
+      else:
+        right_side_check = False
+
+      if (x, y) in block and (x - 1, y) not in block:
+          if not left_side_check:
+            left_side_check = True
+            sum += 1
+      else:
+        left_side_check = False
+
+  return sum
+
 def part1(input_text):
   grid = parse(input_text)
   block_sets = []
@@ -73,7 +125,24 @@ def part1(input_text):
   return sum
 
 def part2(input_text):
-  return 0
+  grid = parse(input_text)
+  block_sets = []
+  visited = set()
+
+  for y in range(len(grid)):
+    for x in range(len(grid[y])):
+      if (x, y) in visited:
+        continue
+      block = blocks(grid, x, y)
+      block_sets.append(block)
+      visited.update(block)
+
+  sum = 0
+  for block in block_sets:
+    s = sides(grid, block)
+    sum += s * len(block)
+
+  return sum
 
 if __name__ == "__main__":
   with open(__file__.rsplit('/', 1)[0] + "/input.txt", 'r') as file:
diff --git a/2024/12/daily_test.py b/2024/12/daily_test.py
index 6026e5d..2e15a28 100644
--- a/2024/12/daily_test.py
+++ b/2024/12/daily_test.py
@@ -16,6 +16,29 @@ def sample_data():
 MMMISSJEEE
 """
 
+@pytest.fixture
+def e_grid():
+  s = """
+EEEEE
+EXXXX
+EEEEE
+EXXXX
+EEEEE
+"""
+  return(parse(s))
+
+@pytest.fixture
+def ab_grid():
+  s = """
+AAAAAA
+AAABBA
+AAABBA
+ABBAAA
+ABBAAA
+AAAAAA
+"""
+  return(parse(s))
+
 @pytest.fixture
 def parsed_data(sample_data):
   return parse(sample_data)
@@ -37,9 +60,16 @@ def test_perimeter(parsed_data):
   b = blocks(parsed_data, 0, 0)
   assert perimeter(parsed_data, b) == 18
 
+def test_sides_e_grid(e_grid):
+  b = blocks(e_grid, 0, 0)
+  assert sides(e_grid, b) == 12
+
+def test_sides_ab_grid(ab_grid):
+  b = blocks(ab_grid, 0, 0)
+  assert sides(ab_grid, b) == 12
 
 def test_part1(sample_data):
   assert part1(sample_data) == 1930
 
-# def test_part2(sample_data):
-#   assert part2(sample_data) == 81
+def test_part2(sample_data):
+  assert part2(sample_data) == 1206