C11112331333132311331333133313331333132313121111331333132333133311212331   >>    C1111233133313231133133313331333133313231312111133133313233313331121233   <<    C11112331333132311331333133313331333132313121111331333132333133311212333   >>      C11112331333132311331333133313331333132313121111331333132333133311212332   >>