____3_____1
____4_____2
____5_____3
____6_____4
__________x
__________x
____3_____3
____2_____1
____2_____1
____2_____1
____3_____2
____4_____4
____8_____3
____8_____3
____8_____3
____6_____1
__________x
__________x
____11____1 opt.
____13____4
____12____2
____13____3
____11____1
__________x
____15____1
____16____2
____17____3
____18____4
__________x
__________x
__________
____16____2
____17____4
____17____3
__________x
____16____1
