(0 7 2)(1 13 3)(4 18 6)(5 12 10)(8 19 17)(9 15 11)(14 20 16)
ALLOWS (11/8)-SEQUENCE
1: (6 15 18)

(0 7 2)(1 13 3)(4 18 11 9 15)(5 12 10)(6)(8 19 17)(14 20 16)
2: (8 19 17)

(0 7 2)(1 13 3)(4 18 11 9 15)(5 12 10)(6)(8)(14 20 16)(17)(19)
3: (14 20 16)

(0 7 2)(1 13 3)(4 18 11 9 15)(5 12 10)(6)(8)(14)(16)(17)(19)(20)
4: (4 18 11)

(0 7 2)(1 13 3)(4 9 15)(5 12 10)(6)(8)(11)(14)(16)(17)(18)(19)(20)