#include<bits/stdc++.h>
using namespace std;

char a;

int main(){
    
    cin>>a;
    if(a>='A'&&a<='Z') cout<<"upper";
    else if(a>='a'&&a<='z') cout<<"lower";
    else if(a>='0'&&a<='9') cout<<"digit";
    else cout<<"other";
    
    return 0;
}