/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
	    String text = "um2tres4cinco6sete8";
		
		String regex = "[0-9]";

		Pattern p = Pattern.compile(regex);
		Matcher m = p.matcher(text);
		
		while(m.find()){
			System.out.println(m.group());
		}
		System.out.println("Total de grupos: " + m.groupCount());
	}
}