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