10 blocks
init:
on 0 3
on 1 6
on 2 4
on 3 8
on 4 9
on 5 t
on 6 7
on 7 0
on 8 t
on 9 1
goal:
on 0 6
on 1 0
on 2 5
on 3 2
on 4 7
on 5 9
on 6 8
on 7 1
on 9 4
