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 Fortran (gfortran v4.8.4) (judge verdict: Runtime Error)

program main
Implicit None
	integer i,N,M,count,Lmax,Rmin
	integer,allocatable :: L(:),R(:)
	read(5,*) N,M
	allocate(L(M),R(M))
	Lmax=0	;Rmin=N
	
	do i=1,M
		read(5,*) L(i),R(i)
		if(L(i).ge.Lmax)	Lmax=L(i)
		if(R(i).le.Rmin)	Rmin=R(i)
	end do
	count=Rmin-Lmax+1
	write(6,'(i0)') count

end program main