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

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

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

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

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