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