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