C12313211232233312111111312111133133313331323133313331122332321121211133322311   >>    C1231321123223331211111131211113313331333132313331333112233232112121113332231   <<    C12313211232233312111111312111133133313331323133313331122332321121211133322313   >>      C12313211232233312111111312111133133313331323133313331122332321121211133322312   >>