Looking to write a rule to replace digits

[pand0ra]

As we all know, people are lazy and predictable when it comes to passwords. I'm writing a rule to replace all digits in a password with every possible combination of other digits and the rule has to be able to identify digits in any location. For example:

Users old password: "Password123" or "My123Password"

I'm looking to get hashcat to create permutations on that so that 123 would be 000-999. I've started on a rule and am looking for guidance on this. What I have currently, I'm not sure will work or not.

Rule:
s10
s12
s13
s14
s15
s16
s17
s18
s19
s21
s23
s24
s25
s26
...
s01
s02
s03
s04
s05
s06
s07
...