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

int main(void) {
	char regex[] = "algoritmo";
	char *vogal = "aeiou";
	for (int i=0;i<strlen(regex);i++)
	{
		for (int j=0;j<strlen(vogal);j++)
		{
			if (regex[i] == vogal[j])
			{
				regex[i] = '.';
			}
		}
	}
	printf(regex);
}