/* package whatever; // don't place package name! */
 
import java.util.*;
import java.util.stream.*;
import java.lang.*;
import java.io.*;
 
/* 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
	{
		Stack<String> stack = new Stack<>();
		stack.add("H");
		stack.add("E");
		stack.add("L");
		stack.add("L");
		stack.add("O");
		System.out.println(stack.stream().collect(Collectors.joining()));
	}
}

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