text: years = [] #stores all years of birth of customers 
  
  cust_num = 1 #gives each customer a number
  num = input("How many cards do you need to check?") #gives number of cards
  for i in range(int(num)): #gets year of birth off card from bartender
      cust_str = "What year was customer "+ str(cust_num)+ " born?"
      report_DOB = input(cust_str)
      years.append(int(report_DOB))
      cust_num += 1
      
  current_year = input("What is the current year?")
  
  
  cust_num = 1
  for i in range(int(num)): #calculates age and verifies legality of customer to drink
      age = int(current_year) - (years[i])
      if age >= 21:
          print("Customer ", cust_num, " is old enough to party. Serve em up.")
      else:
          print("Customer ", cust_num, " is too young. Do not serve.")
      print("Customer", cust_num, " is ", age, " years old.")
      cust_num += 1
  