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

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

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

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

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