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

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

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

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

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