CF_236A

// Codeforces Round 236A
#include <string>
#include <stdio.h>
#include <string.h>
#include <iostream>
using namespace std;
int main()
{
    string s;
    int ss[26], len;
    char sss[101];
    cin >> s;
    strcpy(sss, s.c_str());
    len = s.length();
    for(int i=0;i<26;i++)
    {
        ss[i] = 0;
    }
    for(int i=0;i<len;i++)
    {
        if(sss[i]=='a'){ss[0]=1;}
        else if(sss[i]=='b'){ss[1]=1;}
        else if(sss[i]=='c'){ss[2]=1;}
        else if(sss[i]=='d'){ss[3]=1;}
        else if(sss[i]=='e'){ss[4]=1;}
        else if(sss[i]=='f'){ss[5]=1;}
        else if(sss[i]=='g'){ss[6]=1;}
        else if(sss[i]=='h'){ss[7]=1;}
        else if(sss[i]=='i'){ss[8]=1;}
        else if(sss[i]=='j'){ss[9]=1;}
        else if(sss[i]=='k'){ss[10]=1;}
        else if(sss[i]=='l'){ss[11]=1;}
        else if(sss[i]=='m'){ss[12]=1;}
        else if(sss[i]=='n'){ss[13]=1;}
        else if(sss[i]=='o'){ss[14]=1;}
        else if(sss[i]=='p'){ss[15]=1;}
        else if(sss[i]=='q'){ss[16]=1;}
        else if(sss[i]=='r'){ss[17]=1;}
        else if(sss[i]=='s'){ss[18]=1;}
        else if(sss[i]=='t'){ss[19]=1;}
        else if(sss[i]=='u'){ss[20]=1;}
        else if(sss[i]=='v'){ss[21]=1;}
        else if(sss[i]=='w'){ss[22]=1;}
        else if(sss[i]=='x'){ss[23]=1;}
        else if(sss[i]=='y'){ss[24]=1;}
        else if(sss[i]=='z'){ss[25]=1;}
    }
    int ct = 0;
    for(int i=0;i<26;i++)
    {
        if(ss[i]==1){ct++;}
    }
    if(ct%2==0){cout << "CHAT WITH HER!";}
    else{cout << "IGNORE HIM!";}
    return 0;
}