def printM(someMatrix):
    # HINT 1: print with a comma (print "hello",) prints in the same line
    # HINT 2: "HEY".join(someList) will return a string joined using "HEY"
    # "HEY".join(["hi","howdy","hey"] -> "hiHEYhowdyHEYhey"

def fallStep(someMatrix):
    # ASSIGNMENT 2 (YOUR FIRST GRAVITY SIMULATOR!)
    # Take any item that is not a period, and has a period under
    # And shift it down one tile





