#include <iostream>

using namespace std;

int main()
{

    int m;
    cin >> m;
    int temp = m/2;
    for(int i = 2; i <= temp; i++)
    {
        if(m % i == 0)
        {
            cout << "the number is not dumb" << '\n';
            return 0;
        }
    }
    cout << "the number is dumb" << '\n';
    return 0;
}