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

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

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

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

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