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