If you go in this d, you are writing `I once head...'. The other two ds labelled by red arrows (in ) correspond to writing `I once heard...' and `I once hedge...'.
d horretara joanez gero, idatziko duzu: 'I once head...'. Gezi gorriekin etiketatutako beste bi d letrekin ( irudia) 'I once heard...' idatziko zenuke, eta 'I once hedge...'.