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

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

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

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

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