Problem:
Day of Week

The 9th day of September 2017 is Saturday. Then, what day of the week is the X-th of September 2017?

Given a day in September 2017, write a program to report what day of the week it is.

Input

The input is given in the following format.

X

The input line specifies a day X (1 ≤ X ≤ 30) in September 2017.

Output

Output what day of the week it is in a line. Use the following conventions in your output: "mon" for Monday, "tue" for Tuesday, "wed" for Wednesday, "thu" for Thursday, "fri" for Friday, "sat" for Saturday, and "sun" for Sunday.

Sample Input 1

1

Sample Output 1

fri

Sample Input 2

9

Sample Output 2

sat

Sample Input 3

30

Sample Output 3

sat

Solution in JAVA (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import static java.lang.Integer.parseInt;

/**
 * Day of Week
 */
public class Main {

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

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line;
		String[] words;

		int X = parseInt(br.readLine());

		System.out.println(DAY[(((X - 9) % 7) + 7) % 7]);
	}
}