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

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

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

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

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