(0 20 9 7 3)(1 5 4)(2 16 11 10 6)(8 14 12)(13 18 15)(17 21 19)
ALLOWS (11/8)-SEQUENCE
1: (0 7 12)
(0 8 14 12 3)(1 5 4)(2 16 11 10 6)(7 20 9)(13 18 15)(17 21 19)
2: (2 16 11)
(0 8 14 12 3)(1 5 4)(2 10 6)(7 20 9)(11)(13 18 15)(16)(17 21 19)
3: (0 8 14)
(0 12 3)(1 5 4)(2 10 6)(7 20 9)(8)(11)(13 18 15)(14)(16)(17 21 19)
4: (13 18 15)
(0 12 3)(1 5 4)(2 10 6)(7 20 9)(8)(11)(13)(14)(15)(16)(17 21 19)(18)