#include <iostream>
#include <string>
using namespace std;
int main(void){
    char s;
    cin>>s;
    if(s=='A'){
        cout<<"A#"<<endl;
    }else if(s=='C'){
        cout<<"C#"<<endl;
    }else if(s=='D'){
        cout<<"D#"<<endl;
    }else if(s=='F'){
        cout<<"F#"<<endl;
    }else if(s=='G'){
        cout<<"G#"<<endl;
    }else if(s=='E'){
        cout<<"G"<<endl;
    }else if(s=='B'){
        cout<<"C"<<endl;
    }
    return 0;
}