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

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

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

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

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