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 stdin = new Scanner(System.in);

        String S = stdin.next();

        if(S == "SUN"){
            System.out.print("7");
        }
        else if(S == "MON"){
            System.out.print("6");
        }
        else if(S == "TUE"){
            System.out.print("5");
        }
        else if(S == "WED"){
            System.out.print("4");
        }
        else if(S == "THU"){
            System.out.print("3");
        }
        else if(S == "FRI"){
            System.out.print("2");
        }
        else if(S == "SAT"){
            System.out.print("1");
        }
    }
}