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