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

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

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

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

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