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