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

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

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

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

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