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