C2123132222131133131121131211113313231322331333133311211331333113313223311   >>    C212313222213113313112113121111331323132233133313331121133133311331322331   <<    C2123132222131133131121131211113313231322331333133311211331333113313223313   >>      C2123132222131133131121131211113313231322331333133311211331333113313223312   >>