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

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

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

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

(0 9 8)(1 19 3)(2 7 4)(5)(6)(10)(11 15 13)(12)(14)(16)(17)(18)(20)