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