C2123132222131133131121131211113313231322331333132233131133133313233232221   >>    C212313222213113313112113121111331323132233133313223313113313331323323222   <<    C2123132222131133131121131211113313231322331333132233131133133313233232223   >>      C2123132222131133131121131211113313231322331333132233131133133313233232222   >>