Problem:
Score : 100 points

Problem Statement

Given is a string S representing the day of the week today.

S is SUN, MON, TUE, WED, THU, FRI, or SAT, for Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday, respectively.

After how many days is the next Sunday (tomorrow or later)?

Constraints

S is SUN, MON, TUE, WED, THU, FRI, or SAT.

Input

Input is given from Standard Input in the following format:

S

Output

Print the number of days before the next Sunday.

Sample Input 1

SAT

Sample Output 1

1

It is Saturday today, and tomorrow will be Sunday.

Sample Input 2

SUN

Sample Output 2

7

It is Sunday today, and seven days later, it will be Sunday again.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;

enum NoOfDaysTillSunday
{
	SUN(7),
	MON(6),
	TUE(5),
	WED(4),
	THU(3),
	FRI(2),
	SAT(1);
		
	int numberOfDaysTillSunday;
	NoOfDaysTillSunday(int numberOfDaysTillSunday) {this.numberOfDaysTillSunday = numberOfDaysTillSunday;};
}

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);		
		// get day of week		
		String day = sc.next();
		System.out.println(NoOfDaysTillSunday.valueOf(day).numberOfDaysTillSunday);	
	}
}