diff --git a/Program.cs b/Program.cs
index 7710870..a9b0ea4 100644
--- a/Program.cs
+++ b/Program.cs
@@ -31,13 +31,7 @@ class Program {
                     break;
                 case 2:
                     Console.Clear();
-                    Console.Write("Inserire una frase: ");
-                    //if (Palindromo(Console.ReadLine())) {
-                    Console.WriteLine("La frase è palindroma");
-                    //}
-                    //else {
-                    Console.WriteLine("La frase non è palindroma");
-                    //}
+                    Console.WriteLine(Codifica());
                     Pausa();
                     break;
                 case 3:
@@ -108,4 +102,35 @@ class Program {
         }
         Console.WriteLine();
     }
+
+    static string Codifica() {
+        string stringa = Input();
+        char codice = 'f';
+        const char inutile = '\\';
+        char[] ritorno = new char[stringa.Length * 2];
+        Array.Fill(ritorno, inutile);
+        char[] vocali = { 'a', 'e', 'i', 'o', 'u' };
+        int k = 0;
+
+
+        for (int i = 0; i < stringa.Length; i++) {
+            ritorno[k] = stringa[i];
+            for (int j = 0; j < vocali.Length; j++) {
+                if (stringa[i] == vocali[j]) {
+                    k++;
+                    ritorno[k] = codice;
+                    break;
+                }
+                else if (stringa[i] == char.ToUpper(vocali[j])) {
+                    k++;
+                    ritorno[k] = char.ToUpper(codice);
+                    break;
+                }
+            }
+            k++;
+
+        }
+
+        return string.Join("", ritorno).Split(inutile).First();
+    }
 }
diff --git a/bin/Debug/net9.0/strings_3.dll b/bin/Debug/net9.0/strings_3.dll
index 88273a9..2ffa3d7 100644
Binary files a/bin/Debug/net9.0/strings_3.dll and b/bin/Debug/net9.0/strings_3.dll differ
diff --git a/bin/Debug/net9.0/strings_3.pdb b/bin/Debug/net9.0/strings_3.pdb
index 0c5c070..692d0d0 100644
Binary files a/bin/Debug/net9.0/strings_3.pdb and b/bin/Debug/net9.0/strings_3.pdb differ
diff --git a/obj/Debug/net9.0/ref/strings_3.dll b/obj/Debug/net9.0/ref/strings_3.dll
index e9a57e2..1cb1859 100644
Binary files a/obj/Debug/net9.0/ref/strings_3.dll and b/obj/Debug/net9.0/ref/strings_3.dll differ
diff --git a/obj/Debug/net9.0/refint/strings_3.dll b/obj/Debug/net9.0/refint/strings_3.dll
index e9a57e2..1cb1859 100644
Binary files a/obj/Debug/net9.0/refint/strings_3.dll and b/obj/Debug/net9.0/refint/strings_3.dll differ
diff --git a/obj/Debug/net9.0/strings_3.AssemblyInfo.cs b/obj/Debug/net9.0/strings_3.AssemblyInfo.cs
index 18261e7..31f574e 100644
--- a/obj/Debug/net9.0/strings_3.AssemblyInfo.cs
+++ b/obj/Debug/net9.0/strings_3.AssemblyInfo.cs
@@ -13,10 +13,10 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("strings_3")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+f7c77cc677e2aad807832fec2775b0341e41ffd3")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+d29d204ee494646ce5094700197a900b05cc44aa")]
 [assembly: System.Reflection.AssemblyProductAttribute("strings_3")]
 [assembly: System.Reflection.AssemblyTitleAttribute("strings_3")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
 
-// Generated by the MSBuild WriteCodeFragment class.
+// Generato dalla classe WriteCodeFragment di MSBuild.
 
diff --git a/obj/Debug/net9.0/strings_3.AssemblyInfoInputs.cache b/obj/Debug/net9.0/strings_3.AssemblyInfoInputs.cache
index aefbe2c..96b12b6 100644
--- a/obj/Debug/net9.0/strings_3.AssemblyInfoInputs.cache
+++ b/obj/Debug/net9.0/strings_3.AssemblyInfoInputs.cache
@@ -1 +1 @@
-437b533b5127f5b1e5d132098240dac87416d889e2ff513387be247f3341bce6
+cbb955859c30d97643b375ba8ca1883b485f554c16cef8a828a4aa0bf8968236
diff --git a/obj/Debug/net9.0/strings_3.dll b/obj/Debug/net9.0/strings_3.dll
index 88273a9..2ffa3d7 100644
Binary files a/obj/Debug/net9.0/strings_3.dll and b/obj/Debug/net9.0/strings_3.dll differ
diff --git a/obj/Debug/net9.0/strings_3.pdb b/obj/Debug/net9.0/strings_3.pdb
index 0c5c070..692d0d0 100644
Binary files a/obj/Debug/net9.0/strings_3.pdb and b/obj/Debug/net9.0/strings_3.pdb differ