public String[] execute(Label[] values) {
        resultat = new String[10];
        Label labTmp;
        int it = 0;
        currentState = initialState;
        while (!(inFinalState(currentState)) && existingStates.contains(currentState)) {
            labTmp = values[it];
            currentState = currentState.giveNextState(labTmp);
            resultat[it] = labTmp.getValue();
            it++;
        }
        if (inFinalState(currentState))
            return resultat;

        else {
            resultat[0] = null;
            return resultat;
        }
    }