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