--- /Caverphone.java	2023-07-05 03:02:29.930045434 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/language/Caverphone.java	2023-07-05 03:02:29.934045433 +0200
@@ -100,7 +100,7 @@
         txt = txt.replaceAll("3gh3", "3kh3");
         txt = txt.replaceAll("gh", "22");
         txt = txt.replaceAll("g", "k");
-        txt = txt.replaceAll("s+", "S");
+txt =  null.replaceAll ( "s+", "S" ) ;
         txt = txt.replaceAll("t+", "T");
         txt = txt.replaceAll("p+", "P");
         txt = txt.replaceAll("k+", "K");
