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 Common Lisp (SBCL 2.0.3) (judge verdict: Accepted)

(let ((s (read-line)))
  (cond ((string= s "SUN")
         (format t "7~%"))
        ((string= s "MON")
         (format t "6~%"))
        ((string= s "TUE")
         (format t "5~%"))
        ((string= s "WED")
         (format t "4~%"))
        ((string= s "THU")
         (format t "3~%"))
        ((string= s "FRI")
         (format t "2~%"))
        ((string= s "SAT")
         (format t "1~%"))))