@kreyren why not just use letters from the get go. In the English alphabet you could go up to base 26 before needing to look for new characters.
The added benefit is you would have another listed scheme and with some practice you can easily convert letters to numbers and vice-versa.
@barefootstache bcs when i see letters i am looking for variables or shothands instead of numbers which seems to be similar for other ppl as well..