Fix Trie implementation (#4668)

* encoding

* Fix Trie implementation

data-structures/src/test/java/com/baeldung/trie/TrieTest.java

@@ -1,6 +1,7 @@
 package com.baeldung.trie;
 
 import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
 
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
@@ -53,6 +54,19 @@ public class TrieTest {
         assertFalse(trie.containsNode("Programming"));
     }
 
+    @Test
+    public void givenATrie_whenDeletingOverlappingElements_thenDontDeleteSubElement() {
+
+        Trie trie1 = new Trie();
+
+        trie1.insert("pie");
+        trie1.insert("pies");
+
+        trie1.delete("pies");
+
+        Assertions.assertTrue(trie1.containsNode("pie"));
+    }
+
     private Trie createExampleTrie() {
         Trie trie = new Trie();