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.Scanf("%s",&s)
  switch s {
	case "SUN":
    	fmt.Print("7");
	case "MON":
    	fmt.Print("6")
    case "TUE":
    	fmt.Print("5")
    case "WED":
    	fmt.Print("4")
    case "THU":
    	fmt.Print("3")
    case "FRI":
    	fmt.Print("2")
    case "SAT":
    	fmt.Print("1")
  }
}