C212313222213113313112113121111331323132233133313232233131313221   >>    C21231322221311331311211312111133132313223313331323223313131322   <<    C212313222213113313112113121111331323132233133313232233131313223   >>      C212313222213113313112113121111331323132233133313232233131313222   >>