Problem:
Score : 300 points

Problem Statement

As a token of his gratitude, Takahashi has decided to give his mother an integer sequence.
The sequence A needs to satisfy the conditions below:

A consists of integers between X and Y (inclusive).

For each 1\leq i \leq |A|-1, A_{i+1} is a multiple of A_i and strictly greater than A_i.

Find the maximum possible length of the sequence.

Constraints

1 \leq X \leq Y \leq 10^{18}

All input values are integers.

Input

Input is given from Standard Input in the following format:

X Y

Output

Print the maximum possible length of the sequence.

Sample Input 1

3 20

Sample Output 1

3

The sequence 3,6,18 satisfies the conditions.

Sample Input 2

25 100

Sample Output 2

3

Sample Input 3

314159265 358979323846264338

Sample Output 3

31

Solution in Fortran (gfortran v4.8.4) (judge verdict: Accepted)

program main
	implicit none
	integer counter, i
	integer(8) X, Y
	read(*, *) X, Y
	counter = 1
	do i = 2, 72
		X = X*2
		if(X <= Y) then
			counter = counter + 1
		else
			exit
		end if
	end do
		write(*, *) counter
end program main