C212313222213113313112113121111331323132233133313233113313232211   >>    C21231322221311331311211312111133132313223313331323311331323221   <<    C212313222213113313112113121111331323132233133313233113313232213   >>      C212313222213113313112113121111331323132233133313233113313232212   >>