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