diff --git a/src/08_PTRN/CMakeLists.txt b/src/08_PTRN/CMakeLists.txt
index 66ff7c8..b40f610 100644
--- a/src/08_PTRN/CMakeLists.txt
+++ b/src/08_PTRN/CMakeLists.txt
@@ -1,2 +1,2 @@
 add_executable(08_PTRN_MP MP/VehicleFactory.cpp MP/VehicleFactory.hpp MP/Vehicle.cpp MP/Vehicle.hpp MP/Car.cpp MP/Car.hpp MP/Truck.cpp MP/Truck.hpp MP/Logger.cpp MP/Logger.hpp MP/main.cpp)
-add_executable(08_PTRN_Testat Testat/main.cpp Testat/Money.cpp Testat/Money.h Testat/Currency.h Testat/BankAccount.cpp Testat/BankAccount.h Testat/Cash.cpp Testat/Cash.h Testat/Currency.cpp Testat/Coin.cpp Testat/Coin.h Testat/Bill.cpp Testat/Bill.h Testat/CashFactory.cpp Testat/CashFactory.h Testat/Person.cpp Testat/Person.h)
\ No newline at end of file
+add_executable(08_PTRN_Testat Testat/main.cpp Testat/Money.cpp Testat/Money.h Testat/Currency.h Testat/BankAccount.cpp Testat/BankAccount.h Testat/Cash.cpp Testat/Cash.h Testat/Currency.cpp Testat/Coin.cpp Testat/Coin.h Testat/Bill.cpp Testat/Bill.h Testat/CashFactory.h Testat/Person.cpp Testat/Person.h Testat/CashFactory.cpp)
\ No newline at end of file
diff --git a/src/08_PTRN/Testat/CashFactory.cpp b/src/08_PTRN/Testat/CashFactory.cpp
index 669bf26..9550403 100644
--- a/src/08_PTRN/Testat/CashFactory.cpp
+++ b/src/08_PTRN/Testat/CashFactory.cpp
@@ -1,9 +1,8 @@
 #include <algorithm>
-#include <iostream>
 #include "CashFactory.h"
 
 int allowedBills[5] = {100, 50, 20, 10, 5};
-int allowedCoins[8] = {1, 2, 5, 10, 20, 50, 100, 200};
+int allowedCoins[9] = {1, 2, 5, 10, 20, 50, 100, 200, 300};
 
 Bill * CashFactory::printBill(int value, Currency currency) {
     auto * iter = std::find(std::begin(allowedBills), std::end(allowedBills), value);
@@ -11,10 +10,6 @@ Bill * CashFactory::printBill(int value, Currency currency) {
         return nullptr;
     }else {
         std::string serial = randomString(15);
-        while(std::find(usedSerials.begin(), usedSerials.end(), serial) != usedSerials.end()) {
-            serial = randomString(15);
-        }
-        usedSerials.push_back(serial);
         return new Bill(value, currency, serial);
     }
 }
@@ -30,8 +25,8 @@ std::string CashFactory::randomString(size_t length) {
     auto randchar = []() -> char {
         const char charset[] =
                 "0123456789"
-                "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                "abcdefghijklmnopqrstuvwxyz";
+                "ABCDEFGHIKLMNOPRSTUVWXYZ"
+                "abcdfghijklmnoqrstuvwxyz";
         const size_t max_index = (sizeof(charset) - 1);
         return charset[rand() % max_index];
     };
@@ -39,4 +34,4 @@ std::string CashFactory::randomString(size_t length) {
     std::generate_n(str.begin(), length, randchar);
     return str;
 
-}
+}
\ No newline at end of file
diff --git a/src/08_PTRN/Testat/CashFactory.h b/src/08_PTRN/Testat/CashFactory.h
index a133672..59b33b0 100644
--- a/src/08_PTRN/Testat/CashFactory.h
+++ b/src/08_PTRN/Testat/CashFactory.h
@@ -8,12 +8,10 @@
 
 class CashFactory {
 private:
-    std::vector<std::string> usedSerials;
     std::string randomString(size_t length);
 public:
     Bill * printBill(int value, Currency currency);
     Coin * printCoin(int value, Currency currency);
 };
 
-
-#endif
+#endif
\ No newline at end of file