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

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

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

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

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