diff --git a/core-java-modules/core-java-string-algorithms-4/README.md b/core-java-modules/core-java-string-algorithms-4/README.md
index 19eac0a38c..4ce76f8c6e 100644
--- a/core-java-modules/core-java-string-algorithms-4/README.md
+++ b/core-java-modules/core-java-string-algorithms-4/README.md
@@ -4,3 +4,4 @@ This module contains articles about string-related algorithms.
 
 ### Relevant Articles:
 - [Rotating a Java String By n Characters](https://www.baeldung.com/java-rotate-string-by-n-characters)
+- [Remove Characters From a String That Are in the Other String](https://www.baeldung.com/java-strings-character-difference)