jiandan

#include <bits/stdc++.h>
using namespace std;
int main (){
int a;
cin >> a;
if (a % 7 == 0 )cout << "monday";
else if(a % 7 == 1)cout << "tuesday";
else if(a % 7 ==2)cout << "wednesday";
else if(a % 7 == 3)cout << "thursday";
else if(a % 7 == 4)cout << "friday";
else if(a % 7 == 5)cout << "saturday";
else if(a % 7 == 6)cout << "sunday";
return 0;
}