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