Double numbering

[Konstantin]

Hello. Please help me, what is the best way to solve such a problem?

I have a sequence of files: 001, 002, ... , 020

I need to rename to sequence:
01-001
02-001
01-002
02-002
01-003
...
01-010
02-010

This is just an example. I often have to change the numbering in a similar way, but the type of output data changes. That is, the sequence can be of the form
01-001
02-001
03-001
04-001
01-002
...
03-999
04-999

[Admin]

Hi, can you post some examples here of from file name -> to file name ?
thanks