C11112331312111112111133132313331333133313233313331323221331123111   >>    C1111233131211111211113313231333133313331323331333132322133112311   <<    C11112331312111112111133132313331333133313233313331323221331123113   >>      C11112331312111112111133132313331333133313233313331323221331123112   >>