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