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.Scanner;

public class Main {

    public static void main(String[] args) {
         Scanner r = new Scanner(System.in);
         String day = r.next();
         if (day == "SUN"){
             System.out.println("7");
         System.out.println("It is Sunday today, and seven days later, it will be Sunday again.");}
         else if (day == "MON"){
             System.out.println("6");
         System.out.println("It is Monday today, and six days later, it will be Sunday again.");}




         else if (day=="TUE"){
             System.out.println("5");
             System.out.println("It is Tuesday today, and five days later, it will be Sunday again.");
         }
         else if (day == "WED"){
             System.out.println("4");
             System.out.println("It is Wednesday today, and four days later, it will be Sunday again.");
         }
         else if (day == "THU"){
             System.out.println("3");
         System.out.println("It is Thursday today, and three days later, it will be Sunday again.");}
         else if (day == "FRI"){
             System.out.println("2");
         System.out.println("It is Friday today, and two days later, it will be Sunday again.");}
         else if (day == "SAT"){
             System.out.println("1");
             System.out.println("It is Saturday today, and tomorrow will be Sunday.");
         }
       }
      // System.out.println(x);

    }