/* 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
	{
		int elimiate_user_id = 11;
		String pattern = "^" + elimiate_user_id + ",|," + elimiate_user_id + "\\b";
		System.out.println(pattern);
		System.out.println("11,22,33,44,55,111".replaceAll(pattern, "")); 
		System.out.println("22,33,11,44,55,111".replaceAll(pattern, "")); 
		System.out.println("22,33,44,55,111,11".replaceAll(pattern, "")); 
	}
}

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