#include <iostream>
#include <vector>
#include <cmath>
#include <map>
#include <set>
#include <iomanip>
#include <queue>
#include <algorithm>
#include <numeric>
#include <deque>
#include <complex>
#include <cassert>

using namespace std;
using ll = long long;

int main(){

    char S;
    cin >> S;
    if (S == 'E') cout << "F" << endl;
    else if (S == 'B') cout << "C" << endl;
    else cout << S << '#' << endl;

    return 0;
}