#include <iostream>
using namespace std;

int main() {
    char c;
    cin >> c;

    switch (c) {
    case 'E':
        cout << 'F' << endl;
        break;
    case 'B':
        cout << 'C' << endl;
        break;
    default:
        cout << c << '#' << endl;
        break;
    }
}