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