As akar-0 said, it needs to be a different kata. So you can create your own kata Snail (hard version) that provides a rectangular array.

No. This would be a different kata, and would invalidate all the submitted solutions. It won't be done.

Thanks! Glad you liked it!

Thanks!

Need help to figure out what it means.

Google strsplit.

I suppose code should not return anything in case "" empty element.

Did you red the description until the end: If L or M are empty return string is ""?