import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String regex = "^START\\b.*(?:\\R(?!START\\b|END_OF_MSG\\b).*)*";
		String string = "HELLO\n"
			 + "START ABC DEF GHI JKL\n"
			 + "QWER RANDOM TEXT 213%@#!\n"
			 + "UIOP RANDOMZXCVB123456\n"
			 + "START ABC DEF GHI JKL\n"
			 + "ZZZZZ RANDOMTEXT213%@#!\n"
			 + "11111 RANDOMZXCVB123456\n"
			 + "$$$$$$ SOMEMORETEXT\n"
			 + "START ABC DEF GHI JKL\n"
			 + "QWER RANDOMTEXT213%@#!\n"
			 + "$$$$$ RANDOMZXCVB123456\n"
			 + "END_OF_MSG";
 
		Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
		Matcher matcher = pattern.matcher(string);
 
		while (matcher.find()) {
		    System.out.println(matcher.group(0) + "\n");
		}
	}
}

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