C1111233133313231133133313331333133313223313133121111112113233121   >>    C111123313331323113313331333133313331322331313312111111211323312   <<    C1111233133313231133133313331333133313223313133121111112113233123   >>      C1111233133313231133133313331333133313223313133121111112113233122   >>