#include<bits/stdc++.h>
using namespace std;
int main(){
	char a;
	cin>>a;
    if(a>=65&&a<=90){
    	cout<<"upper";
	}
	else if(a>=48&&a<=57){
    	cout<<"digit";
	}
	else
	   cout<<"lower";
	return 0;
}

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