diff --git a/CM2005 Object Oriented Programming/Topic 5/5.1.9/Wallet.cpp b/CM2005 Object Oriented Programming/Topic 5/5.1.9/Wallet.cpp
index c0c2ce1..474c6c8 100644
--- a/CM2005 Object Oriented Programming/Topic 5/5.1.9/Wallet.cpp	
+++ b/CM2005 Object Oriented Programming/Topic 5/5.1.9/Wallet.cpp	
@@ -36,5 +36,12 @@ bool Wallet::containsCurrency(std::string type, double amount)
 
 std::string Wallet::toString()
 {
-  return "Oink!";
+  std::string s;
+  for(std::pair<std::string, double> pair : currencies)
+  {
+    std::string currency = pair.first;
+    double amount = pair.second;
+    s += currency + " : " + std::to_string(amount) + "\n";
+  }
+  return s;
 }
\ No newline at end of file
diff --git a/CM2005 Object Oriented Programming/Topic 5/5.1.9/a.exe b/CM2005 Object Oriented Programming/Topic 5/5.1.9/a.exe
index 606c3ec..d08a97e 100644
Binary files a/CM2005 Object Oriented Programming/Topic 5/5.1.9/a.exe and b/CM2005 Object Oriented Programming/Topic 5/5.1.9/a.exe differ
diff --git a/CM2005 Object Oriented Programming/Topic 5/5.1.9/main.cpp b/CM2005 Object Oriented Programming/Topic 5/5.1.9/main.cpp
index 93bf4e3..45cbe4e 100644
--- a/CM2005 Object Oriented Programming/Topic 5/5.1.9/main.cpp	
+++ b/CM2005 Object Oriented Programming/Topic 5/5.1.9/main.cpp	
@@ -12,7 +12,8 @@ int main()
     //app.init();
     Wallet wallet;
     wallet.insertCurrency("BTC", 10);
-    std::cout << "Wallet has BTC " << wallet.containsCurrency("BTC", 11) << std::endl;
+    wallet.insertCurrency("USDT", 100.83);
+    std::cout << "Wallet has BTC " << wallet.containsCurrency("USDT", 100.50) << std::endl;
     std::cout << wallet.toString() << std::endl;
     //CSVReader::readCSV("20200317.csv");