#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;
}
    

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

int main() { int n; cin >> n ; if ( n % 7 == 6) { cout << "sunday"; return 0; } if ( n % 7 == 5) { cout << "saturday"; return 0; } if (n % 7 == 1) { cout << "tuesday"; return 0; } if (n % 7 == 0) { cout << "monday"; return 0; } if (n % 7 == 3) { cout << "wednesday"; return 0; } if (n % 7 == 2) { cout << "thursday"; return 0; } if (n % 7 == 4) { cout << "friday"; return 0; }

//开口 return 0; }