#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void escrevevogais(char s[50], int i) {
if (s[i] == 0) return;
escrevevogais(s, i + 1);
if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u') {
printf("%c", s[i]);
}
}
int main() {
char s[50];
fgets(s, 50, stdin);
escrevevogais(s, 0);
}
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