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A. Boy or Girl.cpp
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A. Boy or Girl.cpp
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//https://codeforces.com/contest/236/problem/A
#include <bits/stdc++.h>
#define ll long long int
#define fast_IO ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
int main() {
string s;
cin>>s;
int sum=0;
char characters[26]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
int freq[26]={0};
for(int i=0;i<s.length();i++){
for(int j=0;j<26;j++){
if(s[i]==characters[j])
freq[j]=1;
}
}
for(int i=0;i<26;i++){
if(freq[i]>0){
sum++;
}
}
if(sum%2==0) cout<<"CHAT WITH HER!"<<endl;
else cout<<"IGNORE HIM!"<<endl;
}
//-----------------------------------------------------------
//*another solution using set
#include <bits/stdc++.h>
#define ll long long int
#define fast_IO ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
int main()
{
string s; cin>>s;
set<char> st;
for(int i=0;i<s.length();i++){
st.insert(s[i]);
}
if(st.size()%2==0) cout<<"CHAT WITH HER!";
else cout<<"IGNORE HIM!";
return 0;
}