import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		/* Quedarme con palabras con 4 o más vocales
		   https://es.stackoverflow.com/q/115372/127
		*/
 
		String texto = "Murciélago, buenos días animalito. ¿Qué tal? ¿Vino con su familia?";
		List<String> lista = new ArrayList<String>();
 
		final String regex = "(?:[b-df-hj-nñp-tv-z]*[aeiouáéíóúü]){4}[a-záéíóúüñ]*";
 
		final Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE);
		final Matcher matcher = pattern.matcher(texto);
 
 
		//Agregar todas las coincidencias del regex
		while (matcher.find()) {
			lista.add(matcher.group());
		}
 
		//Imprimir la lista
		System.out.println(lista);
	}
}

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