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

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

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

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

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