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