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

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

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

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

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