Numbers in an interval. X70783

Write a program that reads two numbers $a$ and $b$ (with $a \leq b$), and prints all numbers between $a$ and $b$.

Input

The input consists of two natural numbers $a$ and $b$ such that $a \leq b$.

Output

Print a line (terminated by a newline) containing the numbers $a, a+1, \ldots, b-1, b$. Separate the numbers with commas.

Observation