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 Go (1.6) (judge verdict: Accepted)

package main

import (
	"fmt"
)

func main() {
	var S string
	fmt.Scan(&S)
	var ans int
	switch S {
	case "SAT":
		ans = 1
	case "FRI":
		ans = 2
	case "THU":
		ans = 3
	case "WED":
		ans = 4
	case "TUE":
		ans = 5
	case "MON":
		ans = 6
	case "SUN":
		ans = 7
	}

	fmt.Println(ans)
}