import java.util.*;
import java.util.stream.Collectors;
import java.lang.*;
import java.io.*;
import java.util.regex.*;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "P=32 N=5 M=2 N=12 N=1 S=3";
		System.out.println(s.replaceAll("\\s*\\b(?!N=\\d)\\w+=\\d+", "").trim()); 
	}
}