#include <iostream>
#include <cstdio>

using namespace std;

int f(string &s, int n) {
    for (int i = 0; i < n; i++)
        if ((s[i] > 'z' || s[i] < 'a') && (s[i] > 'Z' || s[i] < 'A'))
            return 1;
    return 0;
}

int main() {
    char buff[79];
    scanf("%s", buff);
    string s(buff);
    int n = s.length();
    if (f(s, n) == 1)
        printf("not all letters");
    else
        printf("all letters");
}