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

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

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

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

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