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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

public class AtCoderA
{
    static void Main()
    {
        string[] days = new string[] { "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" };
        string s = Console.ReadLine();

        int index = 0;
        for (int i = 0; i < days.Length; i++)
        {
            if (days[i].Equals(s))
            {
                index = i;
            }
        }
        Console.WriteLine(7 - index);
    }
}