Hi am new to regex am in a need of regex for input from

ranges from 1 to 6999 accepting -and space in bettween them.

ex: 1-6999 (true- validation)
6999-6999(true- validation)
6999 6999(true- validation)
6999 (true- validation)
0 (false- validation)
1-7000(flase- validation)

i have written an regex :^([1-9]\d{0,2}|[1-6]\d{0,3})?[- ]?([1-9]\d{0,2}|[1-6]\d{0,3})$

but its not working can any one help me!

Thanks in advance!

This is the regex to meet your req