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

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

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

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

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