All possible outcomes of numbers and letters (a-z 0-99)

Python :)

Can anyone help me code this? I cannot find an example anywhere! Its a combination so it will list all possible outcomes like this.

Numbers- 1-9 all possible outcomes is 11,22,33,44,45,59,15 ext.

I need a script for python that can do this with these numbers. 0-99 and a-z so an example of one output could be AA. OR (A1)

1806GA00CXM8 ---------^^-

Now I need these two letters and numbers to be replaced with one of the selected combinations. As my example was AA here is what it should look like.

1806GA00CAA8 ---------^^-

This should loop until it does all the combinations

Ending with,

1806GA00C998

Halfway should look like something like this

1806GA00CN58 (A mixture of numbers of letters)

Outputs to combo.txt

Hopefully, you get this I have tried my self but have got no result.

Summary 1)Make a list of possible combinations 0-99 and a-z. 2)Replace the 2 letters/numbers in the text with the combination. 3)Repeat until it has put all the possible outputs in. 4)Outputs as .txt

txt should look like this after opening.

1806GA00CAA8 1806GA00CAB8 1806GA00CAC8 ... 1806GA00C5N8 1806GA00C5M8 ... 1806GA00CZX8 1806GA00CZZ8

Thanks so much!