C12313211232233312111111312111133133313331323133313331122332321123121322223311   >>    C1231321123223331211111131211113313331333132313331333112233232112312132222331   <<    C12313211232233312111111312111133133313331323133313331122332321123121322223313   >>      C12313211232233312111111312111133133313331323133313331122332321123121322223312   >>