love!

we both think the same thing

How did you pass it if you are not getting the uppercase letters in final string?

dont need use return if function wrote in 1 line

Very nice solution!

oh boy, if you think you are the worst just look at mine. i want to cry even. just kind of demoralizing sometimes to know that i am just so bad at coding and logic. my understanding and comprehension is just weak. i just don't know how to make this simple

Nice one here, man! Much better than the bs that i wrote haha

Short n clear!

better , I convert arr to nested arr each contain pair

When I first saw this solution, I thought it was really clever, so I played with it, it broke, and I wondered why. I thought someone else might be in the same boat, so I took the time to try and explain it as best as I could. Part of understanding this solution is understanding when and when it doesn't work, which is important if someone ever wants to try and use this code in a different scenario. Some people will likely find this helpful, while others won't, and that's all right!