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