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;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] weekdays = { "", "SAT", "FRI", "THU", "WED", "TUE", "MON", "SUN" };
            string s = Console.ReadLine();

            for(int i = 0; i < weekdays.Length; i++)
            {
                if(weekdays[i] == s)
                {
                    Console.WriteLine(i.ToString());
                }
            }
            Console.ReadLine();
        }
    }
}