C2123132222131133131121131211113313231322331333133311211331323233223311   >>    C212313222213113313112113121111331323132233133313331121133132323322331   <<    C2123132222131133131121131211113313231322331333133311211331323233223313   >>      C2123132222131133131121131211113313231322331333133311211331323233223312   >>