#include <bits/stdc++.h>
using namespace std;
void FAST() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
}
long long gcd(long long x, long long y) {
  if (x == 0) return y;
  return gcd(y % x, x);
}
long long powM(long long x, long long y, long long m) {
  long long ans = 1, r = 1;
  x %= m;
  while (r > 0 && r <= y) {
    if (r & y) {
      ans *= x;
      ans %= m;
    }
    r <<= 1;
    x *= x;
    x %= m;
  }
  return ans;
}
map<long long, long long> factorize(long long n) {
  map<long long, long long> ans;
  for (long long i = 2; i * i <= n; i++) {
    while (n % i == 0) {
      ans[i]++;
      n /= i;
    }
  }
  if (n > 1) {
    ans[n]++;
    n = 1;
  }
  return ans;
}
int main() {
  FAST();
  char s[110];
  int a[26] = {0};
  int i, t, m, p = 25;
  cin >> s;
  for (i = 0; i < strlen(s); i++) {
    t = s[i] - 'a';
    if (a[t] == 0) a[t] = 1;
  }
  for (i = 0; i < 26; i++) m = m + a[i];
  if (m % 2 == 1)
    cout << "IGNORE HIM!";
  else
    cout << "CHAT WITH HER!";
  return 0;
}
