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