C2123132222131133131121131211113313231322331333132233131133133313223333221211   >>    C212313222213113313112113121111331323132233133313223313113313331322333322121   <<    C2123132222131133131121131211113313231322331333132233131133133313223333221213   >>      C2123132222131133131121131211113313231322331333132233131133133313223333221212   >>