#include <bits/stdc++.h>
using namespace std;

int main() {
    char ch;
    cin >> ch;

    if (isupper(ch)) {
        cout << "upper" << endl;
    } else if (islower(ch)) {
        cout << "lower" << endl;
    } else if (isdigit(ch)) {
        cout << "digit" << endl;
    } else {
        cout << "other" << endl;
    }

    return 0;
}