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