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: Wrong Answer)

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        // 文字列の入力
		String in = sc.next();

        String[] dow = {"SUN","MON","TUE","WED","THU","FRI","SAT"};

        int i;
        for(i = 0; i < dow.length; i++){    

            if(in.equals(dow[i])){ 
                break;
            }
            
        }
         
        // 出力
        if(in.equals("SUN")){
            System.out.println(0); 
        }else{
            System.out.println(7 - i);
        }   
	}
}