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