First N Integers On One Line

Accept a positive integer n as input and print the first n positive integers on a single line, separated by a comma. There should be no comma after the last number and no spaces anywhere in the output.

Input

A single line containing the positive integer n.

Output

One line: the integers 1 to n separated by commas.

For example, if the input is 5, the output is:

1,2,3,4,5

Your task

Write a complete program: read the input with input() and print the result with print().

Example

Input

5

Output

1,2,3,4,5