#include <iostream>
#include <string>

using namespace std;

int main(){
    int a,b;
    cin>>a>>b;
    for(int i=1;i<=a;i++){
        for(int j=1;j<=b;j++){
            string s;
            cin>>s;
            if (s=="snuke") {
                cout<<(char)('A'+j-1)<<i<<endl;
            }
        }
    }
    return 0;
}