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.io.*;
import java.util.HashMap;
import java.util.Map;

public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  
    Map<String, Integer> week = new HashMap<>();
    week.put("SUN", 1);
    week.put("MON", 2);
    week.put("TUE", 3);
    week.put("WED", 4);
    week.put("THU", 5);
    week.put("FRI", 6);
    week.put("SAT", 7);
    
    int temp = week.get(br.readLine());
    temp++;
    int result = 1;
    while (temp%7 != 1){
      temp++;
      result++;
    }
    System.out.println(result);
  }
}