C11112331333132311331333132313331333133313233121111331333132313223232131232311   >>    C1111233133313231133133313231333133313331323312111133133313231322323213123231   <<    C11112331333132311331333132313331333133313233121111331333132313223232131232313   >>      C11112331333132311331333132313331333133313233121111331333132313223232131232312   >>