What's the point of the r? I did basically the same thing except without the r, and it worked fine.

"foobar00" turns into "foobar01" because the end result after the string was incremented was 2, which did not take up both digits. If it was "foobar09", then it would turn into "foobar10", because the result now takes up both zeros which were in the input. In the case of "foobar099", 99 turns into 100, meaning it now takes up 3 digits. In "foobar099", there are 3 numbers at the end, so you would not include the extra 0 after incrementation.

i forgot to delete import statistics from a previous attempt it is not needed

ok 👍

fixed

we're friends irl and i asked him to test my kata

thanks

i don't know how tbh