#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
typedef long long ll;
using namespace std;

int main() {
    cin.tie(0)->sync_with_stdio(0);

    string S;
    cin >> S;

    if (S == "E")
        cout << "F";
    else if (S == "B")
        cout << "C";
    else
        cout << S << "#";
    cout << "\n";

    return 0;
}