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# (.NET Core 3.1.201) (judge verdict: Accepted)

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

namespace atcoder
{
    class Program
    {
        static void Main(string[] args)
        {
            var w = Console.ReadLine();
            var result = 0;
            switch (w)
            {
                case "SUN":
                    result = 7;
                    break;
                case "MON":
                    result = 6;
                    break;
                case "TUE":
                    result = 5;
                    break;
                case "WED":
                    result = 4;
                    break;
                case "THU":
                    result = 3;
                    break;
                case "FRI":
                    result = 2;
                    break;
                case "SAT":
                    result = 1;
                    break;
            }

            Console.WriteLine(result);
        }
    }
}