Power speed drills?

I was wondering if any of you know what Coach Davies means under his Power speed drills? IT reads: Power Speed-a,b,butt-kick,c what does a,b,c mean? I know what butt kick is but whats the rest of the letters stand for? Any help is appreciated!

just an idea here but why don’t you email me ?I presume you purchased a program and need some extra info. I look forward to hearing from you. In faith, Coach Davies