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