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

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

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

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

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