ACGO

#include <bits/stdc++.h>
using namespace std;
int main(){
char n;
cin>>n;
if(n>='a' && n<='z'){
cout<<"a";
}else if(n>='A' && n<='Z'){
cout<<"A";
}else if(n>='0' && n<='9'){
cout<<"0";
}else{
cout<<"other";
}
return 0;
}