#include <bits/stdc++.h>
using namespace std;
int main() {
int n;
    cin >> n;
    int day = n % 7;
    
    if (day == 0) cout << "monday";
    else if (day == 1) cout << "tuesday";
    else if (day == 2) cout << "wednesday";
    else if (day == 3) cout << "thursday";
    else if (day == 4) cout << "friday";
    else if (day == 5) cout << "saturday";
    else cout << "sunday";
    return 0;
}