C11112331312111112111133133313231333132313331333121111133313223311212231   >>    C1111233131211111211113313331323133313231333133312111113331322331121223   <<    C11112331312111112111133133313231333132313331333121111133313223311212233   >>      C11112331312111112111133133313231333132313331333121111133313223311212232   >>