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