__________x
____1_____2
____0_____0
____1_____1
____3_____3
__________x
____3_____1
____4_____2
____5_____4
____5_____3
____3_____1
__________x
__________x
____8_____4
____5_____1
____5_____1
____6_____2
____8_____3
____8_____1 opt.
____8_____1
____8_____1
____10____4
____10____3
____8_____1
____11____2
____13____4
____12____3
____10____1
__________x
__________x
_________x
____13___3
____12___1
____13___2
____15___4
_________x
