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);
    String S = sc.nextLine();
    
    int days = 0;
    
    if(S == "SUN"){}
    else if(S == "SAT"){ days += 1;}
    else if(S == "FRI"){ days += 2;}
    else if(S == "THU"){ days += 3;}
    else if(S == "WED"){ days += 4;}
    else if(S == "TUE"){ days += 5;}
    else if(S == "MON"){ days += 6;}
    
    System.out.println(days);
  }
}