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