def getCustomer(customerID):
  customer = getCustomers()
  return customer[customerID]

def getCustomers():
  customers = {
    "a": Customer("a","James", "Baker"),
    "b": Customer("b", "Jonathan", "D"),
    "c": Customer("c", "Aleem", "Janmohamed"),
    "d": Customer("d", "Ivo", "Galic"),
    "e": Customer("e", "Joel", "Griffiths"),
    "f": Customer("f", "Michael", "Spinks"),
    "g": Customer("g", "Victor", "Savkov"),
    "h" : Customer("h", "Marcel", "Dempers")
  }
  
  return customers

class Customer:
  def __init__(self, c="", f="", l=""):
    self.customerID = c
    self.firstName  = f
    self.lastName   = l
  def fullName(self):
    return self.firstName + " " + self.lastName

customers = getCustomers()
for customerID in customers:
  print(customers[customerID].fullName())