#include <stdio.h>
#include <string.h>
#include <ctype.h>


int isVocal(char c) {
    char * vowels = "aeiou";

    c = tolower(c);
    return strchr(vowels, c) != NULL;
}

void countAndPrint(char str[], int n) {
    int l = strlen(str), v, s = 0;

    for (int i = 0; i < l - n; i++) {
        v = 0;
        for (int j = i; j < i + n; j++) {
            if (isVocal(str[j])) {
                v++;
            }
        }

        if (v == 2) {
            s++;
            for (int j = i; j < i + n; j++)
                putchar(str[j]);

            putchar('\n');
        }

    }

    printf("%d", s);
}

int main() {
    countAndPrint("forExample",4);
    return 0;
}