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

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

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

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

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