236_A.cpp

#include<bits/stdc++.h>
using namespace std;

#define ull unsigned long long
#define ll long long
#define ld long double
#define endl << "\n"
#define sp << " "
#define spp << " " <<
#define all(v) v.begin(),v.end()
#define a(n) a,a+n
#define lmax 9223372036854775807
#define lmin -9223372036854775808
#define li() for(i=0;i<n;++i)
#define lie(a,b) for(i=a;i<b;++i)
#define lj() for(j=0;j<n;++j)
#define lje(a,b) for(j=a;j<b;++j)
#define ft first
#define sd second
#define pb push_back
#define pf push_pront
#define mod 1000000007
#define lower(str) transform(str.begin(), str.end(), str.begin(), ::tolower);
#define upper(str) transform(str.begin(), str.end(), str.begin(), ::toupper);
#define mset(a,b) memset(a,b,sizeof(a))
#define crap ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define PI acos(-1)

int main(){
//	crap ;
    int timer;
    // cin >>timer;
    timer=1 ;
    while(timer--){
    	ll n,i,j ;
    	string str ;
    	cin >>str ;
    	set<char> st ;
    	n = str.length() ;
    	for(i=0;i<n;++i)
    		st.insert(str[i]) ;
    	n = (ll)st.size() ;
    	if( n%2 == 1 )
    		cout << "IGNORE HIM!" endl ;
    	else
    		cout << "CHAT WITH HER!" endl ;
    }
}