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