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