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