Write a program that reads two numbers a and b (with a ≤ b), and prints all numbers between a and b.
Input
The input consists of two natural numbers a and b such that a ≤ b.
Output
Print a line (terminated by a newline) containing the numbers a, a+1, …, b−1, b. Separate the numbers with commas.
Observation
Input
15 21
Output
15,16,17,18,19,20,21
Input
7 7
Output
7