This is a challenge I came up when I was bored I'm math class, I don't think it's been done yet. I hope everyone has fun doing it. Anyone can do it
Here's mine
A: Ailee, Alex, Amber, A-Tom, Anda
B: Baekhyun, BamBam, Bobby, BI, Bora, B-Joo, Beta, Buffy
C: Chen, Chanyeol, Chanwoo, Cl, Choa, Code, Changmin
D: DO, DK, Donghyuk, Daesung, Donghae, Dara, Dino, Dasom, Delta, Daewon