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

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

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

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

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