== Sorting ==
def r():
    turn_left()
    turn_left()
    turn_left()
def l():
    turn_left()
def line_sort():
    while front_is_clear():
        if on_beeper():
            pick_beeper()
        move()
    if on_beeper():
        pick_beeper()
    l()
    l()
    while carries_beepers():
        put_beeper()
        if front_is_clear():
            move()
    while front_is_clear():
        move()
l()
move()
move()
move()
move()
r()
line_sort()
l()
move()
l()
line_sort()
l()
move()
l()
line_sort()
l()
move()
l()
line_sort()
l()
move()
l()
line_sort()
turn_off()