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