#include <iostream>
#include <vector>
#include <string>

using namespace std;

int trans1 (char c){
    if (c=='D') return 1;
    if (c=='C') return 2;
    if (c=='B') return 3;
    if (c=='A') return 4;
}

char trans2 (int n){
    if (n==1) return 'D';
    if (n==2) return 'C';
    if (n==3) return 'B';
    if (n==4) return 'A';
}

int main(){
    char c,cc;
    int x,y,;
    cin>>c>>x;
    y=trans1 (c);
    if ((y>6)or(y<1)or(x>6)or(x<1)) cout<<"?"<<endl;
        else{
            if ((y-1)>=1) cout<< trans2 (y-1)<<x<<endl;
                else cout<<"--"<<endl;
            if ((x+1)<=6) cout<<c<<x+1<<endl;
                else cout<<"--"<<endl;
            if ((y+1)<=4) cout<<trans2 (y+1)<<x<<endl;
                else cout<<"--"<<endl;
            if ((x-1)>=1) cout<<c<<x-1<<endl;
                else cout<<"--"<<endl;
        }
        system("pause");
}