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