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

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

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

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

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