C1111233133313231133133313331333133313231323331333133313113212121   >>    C111123313331323113313331333133313331323132333133313331311321212   <<    C1111233133313231133133313331333133313231323331333133313113212123   >>      C1111233133313231133133313331333133313231323331333133313113212122   >>