Peter and Vasyl prepared for the certification by topic: "Multiplication". Peter asked a product of all natural numbers from A to B, and Vasyl answered. Help to Vasyl to find A and B. if you have some solution, give that answer which have the least A.
One number, product of numbers. 1 < A ≤ B ≤ 10000.
In one line we have two numbers A and B, which wrote through gap.