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