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