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 n string
	fmt.Scan(&n)

	switch n {
	case "SUN":
		fmt.Println(7)
	case "MON":
		fmt.Println(6)
	case "TUE":
		fmt.Println(5)
	case "WED":
		fmt.Println(4)
	case "THU":
		fmt.Println(3)
	case "FRI":
		fmt.Println(2)
	case "SAT":
		fmt.Println(1)
	}
}