____5_____opt.
____7_____4
____6_____2
____7_____3
____5_____1
__________x
____1_____1
____1_____1
____1_____1
____0_____0
__________x
__________x
__________x
____10____3
____11____4
____11____3
__________x
____10____1
____14____4
____14____4
____11____2
__________x
____12____3
____10____1
____14____3
____14____3
____14____3
____12____1
__________x
__________x
____9_____1
____10____2
____11____3
____12____4
__________x
__________x
