Need Random Number Algo Generator

Hello, I want an application where I can enter 2 fields of numbers and then the program will output and save a csv file of all the combinations of numbers. Example, I supply this info: Column A range: 0001 - 9999 Column B range: 000 - 999 Output file will look like this: 0001, 000 0001, 001 0001, 002 ..... 0001, 999 0002, 000 .......... (And all of the combinations for each column A number range will be saved.) I am running Mac OS X 10.6 so this program can run on that or the command line.