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