C212313222213113313112113121111331323132233133313223313233313133112121   >>    C21231322221311331311211312111133132313223313331322331323331313311212   <<    C212313222213113313112113121111331323132233133313223313233313133112123   >>      C212313222213113313112113121111331323132233133313223313233313133112122   >>