diff --git a/Aufg5/Mastermind.cpp b/Aufg5/Mastermind.cpp
index b02f85f..efb2151 100644
--- a/Aufg5/Mastermind.cpp
+++ b/Aufg5/Mastermind.cpp
@@ -87,11 +87,14 @@ int countMatches(std::vector<std::string> &v1, std::vector<std::string> &v2) {
         shorterSize = v2.size();
     }
 
+    std::vector<std::string> copyOfv2 = v2;
+
     int count = 0;
     for (int i = 0; i < shorterSize; i++) {
         for (int j = 0; j < shorterSize; j++) {
-            if (v1[i] == v2[j]) {
+            if (v1[i] == copyOfv2[j]) {
                 count++;
+                copyOfv2[j] = "I have been counted already";
                 break;
             }
         }