#include<iostream>
#include<cstring>
using namespace std;
int main()
{
char ch[100];
cin>>ch;
int j;
int ll=strlen(ch);
int cunt=0;
for(j=0;j<ll;j++)
{
cunt++;
}
if(cunt%2==0)
{
cout<<"CHAT WITH HER!"<<endl;
}
else
{
cout<<"IGNORE HIM!"<<endl;
}
return 0;
}
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