#include <iostream>
#include <cassert>
#include <map>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  map<string, string> mp = { {"A", "A#"}, {"C", "C#"}, {"D", "D#"}, {"F", "F#"}, {"G", "G#"}, {"E", "F"}, {"B", "C"}};
  string s; cin >> s;
  cout << mp[s] << endl;
  return 0;
}