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