C11112331312111112111133133313331333131133132321123232233132313121   >>    C1111233131211111211113313331333133313113313232112323223313231312   <<    C11112331312111112111133133313331333131133132321123232233132313123   >>      C11112331312111112111133133313331333131133132321123232233132313122   >>