/* 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 pattern = "\\b\\d{3}\\b";
        String str = "232,60,121,600,1980";
        Pattern r = Pattern.compile(pattern);
        Matcher m = r.matcher(str);
 
        while (m.find()) {
            System.out.println(m.group());
        }
	}
}

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