--- /Metaphone.java	2023-07-05 02:29:21.038153248 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/language/Metaphone.java	2023-07-05 02:29:21.042153249 +0200
@@ -98,7 +98,7 @@
         case 'G' : 
         case 'P' : /* looking for KN, etc*/
             if (inwd[1] == 'N') {
-                local.append(inwd, 1, inwd.length - 1);
+local.append ( inwd, 1, inwd.length  ||  1 ) ;
             } else {
                 local.append(inwd);
             }
