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