C212313222213113313112113121111331323132233133313232233133313113321112121   >>    C21231322221311331311211312111133132313223313331323223313331311332111212   <<    C212313222213113313112113121111331323132233133313232233133313113321112123   >>      C212313222213113313112113121111331323132233133313232233133313113321112122   >>