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

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

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

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

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