#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < n; i++)
#define srep(i,a,b) for(int i = a; i < b; i++)
#define all(A) (A).begin(),A.end()
#define MOD 1000000007
using namespace std;
using ll = long long;
using P = pair<char,int>;
using Graph = vector<vector<int>>;

int main(void){
	char s; cin >> s;
	if(s == 'A') cout << "A#";
	else if(s == 'C') cout << "C#";
	else if(s == 'D') cout << "D#";
	else if(s == 'F') cout << "F#";
	else if(s == 'G') cout << "G#";
	else if(s == 'E') cout << "F";
	else cout << "C";
	cout << endl;
}