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

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

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

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

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