vocali

int vowels_check(char *str){
    int i, cnt = 0;

    for (i = 0; i < strlen(str); i++){
        if (str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' || str[i] == 'u'){
            cnt++;
        }
    }
    return cnt;
}

int all_vowels(char *str){
    int i, j;
    int words = 0;
    int cnt = 0;
    char *tmp;

    tmp = strtok(str, " ");
    cnt = vowels_check(tmp);
    if (cnt >= 5){
        words++;
    }

    while ((tmp = strtok(NULL, " ")) != NULL){
        cnt = vowels_check(tmp);
        if (cnt >= 5){
            words++;
        }
    }

    return words;
}