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