I like it!

Looks like brute force approach, anyway happen to be. Good.

How does this work?

Likewise. Based on old, good Soviet cartoon... Love it.

Прикольный ник

Thank you for kata. Extra time become convinced that regexp is the powerfull trick.

Elegant solution for 'if/else 0'. Every time forget about if, however met it several times before.

Thank you for kata. From a first glance, looks like challenging and solid 6 kyu or higher. However a bit later, I'd say it's good 7 kyu kata!

It's a worth considering сompound expression.

Thank you for kata! Very like it despite some pain gained.

In your solution, if you remove the 'Walrus operator',
nothing will change.
Everything worked,
and will continue to work without the 'Walrus operator'

Thank you! You've saved me from reading description. Sometimes there is a too longread and confusing descriptions.

Quite a tedious job!