So I was reading Fonzy's post on the changes in phone numbers by adding an extra digit, with so many permutations, and then I started to think, why not just add a Zero in front of all the numbers?
for Example 662-5643 becomes 0662-5643 and 913-4567 becomes 0913-4567 and 4740052 becomes 0474-0052, it is the [...]