C212313222213113313112113121111331323132233133313223313232322311   >>    C21231322221311331311211312111133132313223313331322331323232231   <<    C212313222213113313112113121111331323132233133313223313232322313   >>      C212313222213113313112113121111331323132233133313223313232322312   >>