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