3rd Street uses an 8 punch number system. If you’re right-handed (orthodox), your lead is your left. If you’re left-handed (southpaw), your lead is your right.
1 = jab
2 = cross (straight with rear hand)
3 = lead hook to the head
4 = lead hook to the body
5 = rear hook to the body
6 = lead uppercut
7 = rear uppercut
8 = rear hook to the head