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