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

int main(){
    char S;
    cin >> S;
    if(S == 'E' || S == 'B') cout << char(S + 1) << endl;
    else cout << S << '#' << endl;
    return 0;
}