/* package whatever; // don't place package name! */
 
import java.util.*;
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
	{
		String row = "first, second, {elem1, elem2, elem3}, fourth";
		String[] split = row.split(", (?=[^\\}]*(?:\\{|$))");
		for(String a:split)
		{
			System.out.println(a);
		}
	}
}

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