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