__________x
____2_____1
____4_____4
____3_____2
____4_____3
__________x
____4_____1
____6_____4
____4_____1
____6_____3
____4_____1
__________x
__________
____9_____3
____10____4
____9_____2
__________x
____9_____1
____9_____1 opt.
____12____4
____10____2
____9_____1
____11____3
____9_____1
____7_____1
____9_____2
____10____3
____11____4
__________x
__________x
____13____4
____12____2
____13____3
____11____1
__________x
__________x
