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