diff --git a/2018_05/Program.cs b/2018_05/Program.cs
index 055f93d..2a0a3cd 100644
--- a/2018_05/Program.cs
+++ b/2018_05/Program.cs
@@ -16,7 +16,24 @@ namespace _2018_05
             string resTab = File.ReadAllText(@"..\..\..\Data\Adventofcode_181205\2018_05_data.txt");
             //string resTab = "dabAcCaCBAcCcaDA";
 
+            SortedSet<Char> charset = new SortedSet<char>();
+            foreach(char x in resTab.ToCharArray())
+            {
+                try
+                {
+                    charset.Add(x);
+                }
+                catch (Exception)
+                { }
 
+            }
+
+            foreach(char y in charset)
+            {
+                Write($"{y},");
+            }
+
+            ReadKey();
 
             int varv = 0;