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