/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* 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 s = "{{{abc}}";
		StringBuffer result = new StringBuffer();
		Matcher m = Pattern.compile("(\\{\\{[^{}]*}})|[{}]").matcher(s);
		while (m.find()) {
    		if (m.group(1) != null) {
    			m.appendReplacement(result, m.group(1));
    		} else {
    			m.appendReplacement(result, "\\\\" + m.group());
    		}
		}
		m.appendTail(result);
		System.out.println(result.toString());
 
	}
}

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