/* 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 = "####THIS_IS_A_HASHTAG;;;#This_1_2...#12_and_this ";
		String regex = "#[A-Za-z0-9_]+";
		
         Matcher m = Pattern.compile(regex).matcher(text);
         
 while (m.find()) {
   System.out.println(m.group());
 }
	
    }
}