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