I have some data that looks like this:

Store Account #
1 4201
4203
4204
5 4201
4203
4204

I eventually want it to look like this:

Store Account #
1 4201
1 4203
1 4204
5 4201
5 4203
5 4204

I'm hoping to avoid doing it by hand. Is there a macro I can record or
write that will accomplish this? Thanks for the help in advance.