(0 20 4)(1 13 11 9 2)(3 7 5)(6 12 8)(10 21 19 16 14)(15 18 17)
ALLOWS (11/8)-SEQUENCE
1: (0 1 4)
(0)(1 20 4 13 11 9 2)(3 7 5)(6 12 8)(10 21 19 16 14)(15 18 17)
2: (4 13 20)
(0)(1 20 11 9 2)(3 7 5)(4)(6 12 8)(10 21 19 16 14)(13)(15 18 17)
3: (10 21 19)
(0)(1 20 11 9 2)(3 7 5)(4)(6 12 8)(10 16 14)(13)(15 18 17)(19)(21)
4: (2 11 9)
(0)(1 20 11)(2)(3 7 5)(4)(6 12 8)(9)(10 16 14)(13)(15 18 17)(19)(21)