C13223313311212111133133313331333132313231323331333133311222221   >>    C1322331331121211113313331333133313231323132333133313331122222   <<    C13223313311212111133133313331333132313231323331333133311222223   >>      C13223313311212111133133313331333132313231323331333133311222222   >>