#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; }