#include<bits/stdc++.h>
using namespace std;
char add(char n)
{
	if(n>='A' && n<='Z') return 1;
	else if(n>='a' && n<='z') return 2;
	else if(n>='0' && n<='9') return 3;
	else return 4;
}
int main()
{
	char n;
	cin>>n;
	if(add(n)==1) cout<<"upper";
	else if(add(n)==2) cout<<"lower";
	else if(add(n)==3) cout<<"digit";
	else if(add(n)==4) cout<<"other";
	return 0;
}

#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;
}