diff --git a/docs/exPuzzlers/kotlin/std.kt b/docs/exPuzzlers/kotlin/std.kt
index ba01f1845f8..797a7540927 100644
--- a/docs/exPuzzlers/kotlin/std.kt
+++ b/docs/exPuzzlers/kotlin/std.kt
@@ -56,6 +56,6 @@ namespace io {
 
 namespace string {
     fun String.replaceAll(pattern : String, replacement : String) : String {
-        return java.util.regex.Pattern.compile(pattern).matcher(this).replaceAll(replacement).npe()
+        return (this as java.lang.String).replace(pattern as CharSequence, replacement as CharSequence).npe()
     }
 }
\ No newline at end of file
diff --git a/docs/exPuzzlers/src/_03_character/_20_Whats_My_Class/Me.kt b/docs/exPuzzlers/src/_03_character/_20_Whats_My_Class/Me.kt
index 0462cfba23e..e9012cc3994 100644
--- a/docs/exPuzzlers/src/_03_character/_20_Whats_My_Class/Me.kt
+++ b/docs/exPuzzlers/src/_03_character/_20_Whats_My_Class/Me.kt
@@ -15,5 +15,4 @@ fun main(args : Array<String>) {
     // Note: \u000A is Unicode representation of linefeed (LF)
     val c : Char = 0x000A .chr;
     println(c);
-    println("a\u \u0 \u00 \u000 \u0000 \u0AaA \u0AAz.length( ) + \u0022b")
 }