It's Jihyun + Hyuna and Gayoon + Jiyoon + Sohyun if i remember correctly
that's what i thought, but i didn't know if they always stayed like that or they rotated, bc some groups do that.
[Random] I've just made an Onehallyu thread at AKP
Mods are gonna ban me, but #YOLO
lol. i guess onehallyu is going to be the new banned word there instead of hallyu8.