Completed this cata. Such a noob I was.

Thanks. I passed all the random tests but fixed test got an error

TypeError: Cannot read property 'length' of null
at change (test.js:7:33)
at Context.it (test.js:32:24)

Cannot figure out why

¯_(ツ)_/¯

wow, so nice, I am too clever with for cycle

I don't understand the objective

Too lazy to make an Object

Thank you for saying it, I’m already hysterical