diff --git a/IranSystemConvertor/ConvertTo.cs b/IranSystemConvertor/ConvertTo.cs
index 376b31b..62868e2 100644
--- a/IranSystemConvertor/ConvertTo.cs
+++ b/IranSystemConvertor/ConvertTo.cs
@@ -294,7 +294,7 @@ static string IncludeNumbers(string convertedString)
                 string number = Reverse(NumbersInTheString.Pop());
                 if(!string.IsNullOrWhiteSpace(number))
                 {
-                    int index = convertedString.IndexOf("#");
+                    int index = convertedString.LastIndexOf("#");
 
                     convertedString = convertedString.Remove(index, 1);
                     convertedString = convertedString.Insert(index, number);