Imagine a Graph 1

Imagine a graph of infinite nodes labelled with positive integers from 1 to $\infty$.

Take every pair of nodes that are labelled with prime numbers and multiply the two prime numbers. You will get a composite number. Draw an edge between the first prime number and the composite number. Then draw another edge between the second prime number and the composite number.

You will be given two numbers. You have to tell whether there is a path between these two numbers.

Input

The input will contain two integers $A$ and $B$ ($1 \le A, B \le 10^7$).

Output

Print “Yes” (w/o quotes) if there is a path between $A$ and $B$. Otherwise, print “No” (w/o quotes).

Sample

Input	Output
2 15	Yes
There is a path from 2 to 10 to 5 to 15.