Problem:
Score : 100 points

Problem Statement

Takahashi, who is A years old, is riding a Ferris wheel.

It costs B yen (B is an even number) to ride the Ferris wheel if you are 13 years old or older, but children between 6 and 12 years old (inclusive) can ride it for half the cost, and children who are 5 years old or younger are free of charge. (Yen is the currency of Japan.)

Find the cost of the Ferris wheel for Takahashi.

Constraints

0 ≤ A ≤ 100

2 ≤ B ≤ 1000

B is an even number.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the cost of the Ferris wheel for Takahashi.

Sample Input 1

30 100

Sample Output 1

100

Takahashi is 30 years old now, and the cost of the Ferris wheel is 100 yen.

Sample Input 2

12 100

Sample Output 2

50

Takahashi is 12 years old, and the cost of the Ferris wheel is the half of 100 yen, that is, 50 yen.

Sample Input 3

0 100

Sample Output 3

0

Takahashi is 0 years old, and he can ride the Ferris wheel for free.

Solution in Common Lisp (SBCL 1.1.14) (judge verdict: Runtime Error)

(defun split (input stack-string output-list)
  (let ((chara (car input)))
    (case chara
          ((nil) (append output-list (list stack-string)))
          (#\space (split (cdr input)
                                  '()
                                  (append output-list (list stack-string))))
          (otherwise (split (cdr input)
                                    (concatenate 'string stack-string (list chara))
                                    output-list)))))

(defun input-to-list (input)
  (mapcar #'parse-integer (split (concatenate 'list input)
                                 '()
                                 '())))
(defparameter param (input-to-list (readline)))
(princ (cond ((<= (car param) 5) 0)
  ((and (<= (car param) 12)
        (>= (car param) 6)) (/ (cadr param) 2))
  (t (cadr param))))