text: import typing
  
  
  class BankAccount(object):
      def __init__(self, initial_balance: int = 0) -> None:
          self.balance = initial_balance
  
      def deposit(self, amount: int) -> None:
          self.balance += amount
  
      def withdraw(self, amount: int) -> None:
          self.balance -= amount
  
      def overdrawn(self) -> bool:
          return self.balance < 0
  my_account = BankAccount(15)
  my_account.withdraw(5)
  print(my_account.balance)
  