#include <bits/stdc++.h>
#define rep(i, l, r) for (int i = (l); i < (r); i++)
using namespace std;

typedef long long ll;

int main() {
    char S;
    cin >> S;
    if (S == 'E') {
        cout << "F\n";
    } else if (S == 'B') {
        cout << "C\n";
    } else {
        cout << S << "#\n";
    }
}