C11112331312111112111133133313331333131331123231333132313232233211231   >>    C1111233131211111211113313331333133313133112323133313231323223321123   <<    C11112331312111112111133133313331333131331123231333132313232233211233   >>      C11112331312111112111133133313331333131331123231333132313232233211232   >>