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

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

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

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

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