C1111233133313231133133313331333133311221123121111331311213233311   >>    C111123313331323113313331333133313331122112312111133131121323331   <<    C1111233133313231133133313331333133311221123121111331311213233313   >>      C1111233133313231133133313331333133311221123121111331311213233312   >>