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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

int main()
{
	std::string S;
	std::cin >> S;

	std::vector<std::string> week(7);
	week[0] = "SAT";
	week[1] = "FRI";
	week[2] = "THU";
	week[3] = "WED";
	week[4] = "TUE";
	week[5] = "MON";
	week[6] = "SUN";

	auto i = std::find(week.begin(), week.end(), S) - std::begin(week) + 1;

	std::cout << i << std::endl;

}