C212313222213113313112113121111331323132233133313231323223322121   >>    C21231322221311331311211312111133132313223313331323132322332212   <<    C212313222213113313112113121111331323132233133313231323223322123   >>      C212313222213113313112113121111331323132233133313231323223322122   >>