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

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

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

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

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