C12313211232233312111111312111133133313331323133313331122332321122221111231   >>    C1231321123223331211111131211113313331333132313331333112233232112222111123   <<    C12313211232233312111111312111133133313331323133313331122332321122221111233   >>      C12313211232233312111111312111133133313331323133313331122332321122221111232   >>