最多约数问题

正整数x 的约数是能整除x 的正整数。正整数x 的约数个数记为div(x)。例如，1，2，5，10 都是正整数10 的约数，且div(10)=4。设a 和b 是2 个正整数，a≤b，找出a 和b之间约数个数最多的数x。

编程任务：对于给定的2 个正整数a≤b，编程计算a 和b 之间约数个数最多的数。

Input

输入数据的第1 行有2 个正整数a和b。

Output -Up to a few issues about some positive integer x can be divisible by x number of positive integer. Some positive integer x the number recorded as the number of div (x). For example, 1,2,5,10 are about 10 positive integer number, and div (10) = 4. For a and b are two positive integers, a ≤ b, find a and b between the number of up to about a few of the number of x. Programming tasks: For a given two positive integers a ≤ b, calculated between a and b about the number of the largest number of number. Input input data line 1 are two positive integers a and b. Output