/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.Scanner;
 
/* 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
	{
		Scanner in = new Scanner (System.in);
		String source, delete;
		source = in.nextLine();
		delete = in.nextLine();
		source = source.replace (delete, "");
		System.out.println (source);
	}
}

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

aGVsbG8sIHdvcmxkIQpoZWxsbwoK

hello, world!
hello