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: Runtime Error)

import java.util.Scanner;
class Main
{
    public static void main(String[] args)
    {
        int a;//何文字後か
        String str;
        String str2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        String [] sa2 = str2.split("");
        Scanner scan1 = new Scanner(System.in);
        Scanner scan2 = new Scanner(System.in);
        a = scan1.nextInt();
        str = scan2.nextLine();
        String [] sa = str.split("");//から文字で区切り配列に格納
        for(int i=0;i<str.length();i++){
            sa[i] = sa2[(a+i)%25]; //剰余で何文字ずれるか計算
            System.out.print(sa[i]);
        }
        System.out.println("");
    }
}