0359:

import java.io.*;
import java.util.*;

class Main {
    static final String[] wd = { "thu", "fri", "sat", "sun", "mon", "tue", "wed" };

    void solve(){
        Scanner sc = new Scanner( System.in );
        int d = sc.nextInt();
        System.out.println( wd[d%7] );
    }
    public static void main( String[] a ) {new Main.solve(); }
}