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