#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define fi first
#define se second
#define all(a) a.begin(),a.end()
int main(){
  char s;
  cin >> s;
  if(s=='E') cout << "F\n";
  else if(s=='B') cout << "C\n";
  else cout << s << "#\n";
  return 0;
}