____4_____1
____5_____2
____6_____3
____7_____4
__________x
__________x
____2_____1
____4_____4
____3_____2
____4_____3
____2_____1
__________x
____9_____3
____9_____3
____9_____3
____7_____1
__________x
__________x
____12____1 opt.
____14____4
____13____2
____14____3
____12____1
__________x
____16____1
____17____2
____18____3
____19____4
__________x
__________x
__________
____17____2
____18____4
____18____3
__________x
____17____1
