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: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = Console.ReadLine();
            string[] ss = { "SUN","MON", "TUE", "WED", "THU", "FRI", "SAT" };
            bool sss = true;
            for (int i = 0; i <= ss.Length-2; i++)
            {
                if(s == ss[i])
                {
                    Console.WriteLine(ss[i + 1]);
                    sss = false;
                }
            }
            if (sss)
            {
                Console.WriteLine(ss[0]);
            }
        }
    }
}