C1111233133313231133133313331333133311221123121111331333131131212311   >>    C111123313331323113313331333133313331122112312111133133313113121231   <<    C1111233133313231133133313331333133311221123121111331333131131212313   >>      C1111233133313231133133313331333133311221123121111331333131131212312   >>