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