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