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

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

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

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

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