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