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

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

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

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

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