fichier = open("dico.txt", "r")
liste_mots = fichier.readlines()
fichier.close()

nb = 0
voyelles = {"a", "i", "o", "u", "y"}   # on oublie le e volontairement
for mot in liste_mots:
    e_present = False
    nb_voyelles = 0
    mot = mot.rstrip()
    for lettre in mot:
        if lettre in voyelles:
            nb_voyelles += 1
        if lettre == "e":
            e_present = True
    if e_present and nb_voyelles == 0:
        nb += 1
print(100*nb/len(liste_mots),"%")