C12313211232233312111111312111133133313331323133313332221331212112232132233311   >>    C1231321123223331211111131211113313331333132313331333222133121211223213223331   <<    C12313211232233312111111312111133133313331323133313332221331212112232132233313   >>      C12313211232233312111111312111133133313331323133313332221331212112232132233312   >>