C11112331312111112111133133313331333132313233313331333132322132313123121   >>    C1111233131211111211113313331333133313231323331333133313232213231312312   <<    C11112331312111112111133133313331333132313233313331333132322132313123123   >>      C11112331312111112111133133313331333132313233313331333132322132313123122   >>