#include <iostream>

using namespace std;

int main() {

    int a, i, k;
    cin >> a >> k;

    i = 0;
    while( a > 0){
        i++;
        a = a / 10;
    }

    if (i == k) cout << "Udacha" << endl;
    else
    cout << "Neudacha" << endl;
    return 0;
}