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