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