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