> rocks must of spent

Did you mean to say "must have"?
Explanation: You probably meant to say could've/should've/would've which sounds like 'of' but is actually short for 'have'.
^^I'm ^^a ^^bot ^^that ^^corrects ^^grammar/spelling ^^mistakes. ^^PM ^^me ^^if ^^I'm ^^wrong ^^or ^^if ^^you ^^have ^^any ^^suggestions.
^^Github