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

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

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

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

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