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 PHP7 (7.0.15) (judge verdict: Wrong Answer)

<?php

#C - Prison

fscanf(STDIN, "%d %d", $N, $M);

# 最初のゲートを取得
fscanf(STDIN, "%d %d", $begin, $end);
$back_gate = range($begin, $end);

for ( $i = 1 ; $i < $M ; $i++ ) {
    fscanf(STDIN, "%d %d", $begin, $end);
    $next_gate = range($begin, $end);
    $back_gate = array_intersect($back_gate, $next_gate);
    if (count($back_gate) == 0) {
        break;
    }
}

echo count($back_gate);