Members: Seung-woo, Seung-sik, Chan*, Se-jun, Han-se, Byung-chan, and Su-bin.
No hyphens, no separation (and thankfully no members with stage names for this example).
I could write the names in many different ways and have them all be correct, but for the sake of simplicity, I've picked one way.
I hope that's a simple guide to the basics for you, but if you have any questions, please do get in touch!
*Chan is one of the exceptions to the ‘three-syllable/character block name’. He was born Heo Chan. His brother was in Madtown and also has a two-syllable name – Heo Jun.