Validation with list comprehension

choices = ("P3",
           "P5",
           "P7",
           "16GB",
           "32GB",
           "1TB",
           "2TB",
           "19\"",
           "23\"",
           "Mini Tower",
           "Midi Tower",
           "2 ports",
           "4 ports")
processors = [processor.lower() for processor in choices[:3]]
while processor_choice.lower() not in processors:
    print("That is not a valid choice.")
    processor_choice: str = input("Please choose again: ")