C11112331312111112111133133313331333132313233313331333132322211231231   >>    C1111233131211111211113313331333133313231323331333133313232221123123   <<    C11112331312111112111133133313331333132313233313331333132322211231233   >>      C11112331312111112111133133313331333132313233313331333132322211231232   >>