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

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

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

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

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