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

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

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

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

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