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

int main(){
  char S;
  cin >> S;
  if(S == 'A' || S == 'C' || S == 'D' || S == 'F' || S == 'G') cout << S << "#" << endl;
  else if(S == 'E') cout << "F" << endl;
  else cout << "C" << endl;
}