diff --git a/src/main/java/lc/misc/HelperFunctions.java b/src/main/java/lc/misc/HelperFunctions.java
index fa12fc8..bda31b8 100644
--- a/src/main/java/lc/misc/HelperFunctions.java
+++ b/src/main/java/lc/misc/HelperFunctions.java
@@ -11,10 +11,10 @@ public class HelperFunctions {
         RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
   }
 
-  public static final String safeAlphabets = "ABCDEFGHJKMNOPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
-  public static final String allAlphabets = safeAlphabets + "ILl";
+  public static final String safeAlphabets = "ABCDEFGHJKMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
+  public static final String allAlphabets = safeAlphabets + "ILlO";
   public static final String safeNumbers = "23456789";
-  public static final String allNumbers = safeNumbers + "1";
+  public static final String allNumbers = safeNumbers + "10";
   public static final String specialCharacters = "$#%@&?";
   public static final String safeCharacters = safeAlphabets + safeNumbers + specialCharacters;