C212313222213113313112113121111331323132233133313223313232122321   >>    C21231322221311331311211312111133132313223313331322331323212232   <<    C212313222213113313112113121111331323132233133313223313232122323   >>      C212313222213113313112113121111331323132233133313223313232122322   >>