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.Scanner;
class Main{
	static Scanner sc = new Scanner(System.in);
  public static int nextSunday(String str){
      	final int SUNDAY = 7;
  	switch(str){
      case "SUN":
          return SUNDAY - 0;
      case "MON":
          return SUNDAY - 1;
      case "TUE":
          return SUNDAY - 2;
      case "WED":
          return SUNDAY - 3;
      case "THU":
          return SUNDAY - 4;
      case "FRI":
          return SUNDAY - 5;
      default:
        return 1;
    }
  }
  public static void main(String[] args){
  	final int SUNDAY = 7;
    String str = sc.next();
    System.out.println(nextSunday(str));
  }
}