/* 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 value1 = "15 000 km\n15,000 km\n15.000 km\n15 000 km";
		String pattern1 = "(?U)\\d+[\\s.,]?\\d+";
		Pattern ptrn = Pattern.compile(pattern1);
    	Matcher matcher = ptrn.matcher(value1);
    	while (matcher.find())
      		System.out.println(matcher.group(0));
	}
}

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