public  boolean ValiderLettre(char cLettre){


        //Nettoyage de la lettre
        String sLettre = Character.toString(cLettre);
        sLettre = sLettre.toLowerCase();
        sLettre = sLettre.replaceAll("[èéêë]","e");
        sLettre = sLettre.replaceAll("[ûù]","u");
        sLettre = sLettre.replaceAll("[ïî]","i");
        sLettre = sLettre.replaceAll("[àâ]","a");
        sLettre = sLettre.replaceAll("ô","o");
        cLettre = sLettre.charAt(0);


        if(_lettresDemandees.contains(cLettre)){
            return true;
        }
        else{
            boolean estBonneLettre = false;
            _lettresDemandees.add(cLettre);

            for(int i = 0; i < reponse.length(); i++){

                //Nettoyage de la reponse
                String reponseNettoye = reponse.toLowerCase();
                reponseNettoye = reponseNettoye.replaceAll("[èéêë]","e");
                reponseNettoye = reponseNettoye.replaceAll("[ûù]","u");
                reponseNettoye = reponseNettoye.replaceAll("[ïî]","i");
                reponseNettoye = reponseNettoye.replaceAll("[àâ]","a");
                reponseNettoye = reponseNettoye.replaceAll("ô","o");

                if(reponseNettoye.charAt(i) == cLettre){
                    String replaceString = this.lettresRestantes.replace(cLettre,'_');
                    this.lettresRestantes = replaceString;

                    _acMotActuel[i] = reponse.charAt(i);

                    estBonneLettre = true;
                }
            }

            if(estBonneLettre){
                VerifierFinPartie();
                return true;
            }
        }

        VerifierFinPartie();
        return false;
    }