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