____0_____0 opt.
____2_____3 or 4
____2_____2 or 3
____2_____1 or 2
____0_____0
__________x
____5_____4 opt.
____2_____1
____2_____1
____2_____1
____4_____2
____5_____3
____5_____1
____5_____1
____6_____2
____7_____4
____7_____3
____5_____1
____9_____1
____10____2
____9_____1
____11____3
____12____4
__________x
____12____1 opt.
____14____3
____14____3
____14____3
____12____1
__________x
____17____4 opt.
____14____1
____14____1
____14____1
____16____2
____17____3
____9_____3
____10____4
____9_____2
____7_____1
__________x
__________x
