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