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

int main() {
    string 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;
    }
}