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;
class Program
{
    static void Main(string[] args)
    {
        string input = Console.ReadLine();
        int ans = 0;

        switch (input)
        {
            case "SUN":
                ans = 7;
                break ;
            case "MON":
                ans = 6;
                break;
            case "TUE":
                ans = 5;
                break;
            case "WED":
                ans = 4;
                break;
            case "THU":
                ans = 3;
                break;
            case "FRI":
                ans = 2;
                break;
            case "SAT":
                ans = 1;
                break;
        }
        Console.Write(ans);
    }
}