rollercoaster
IT BEGINS
Tip: you do not have to
be lined up to push heavy
blocks.
*
a a b b b b b b b
a a b b b b b a b
a a b b b b b a b
a a b b b b b a b b
a a b b b b b a bc b
bbb a b bc b b b a b b
bb a b b b b b a bd
bb a a a b a a a bb
bbi bb bb bb b bb bb bb bb
bb a a a b
bb a a b1 b b2
bbi