What’s wrong with this code?

Question

letter = input(“write a letter: ”). lower()

While letter != “m” or letter != “i”:
print(“Choose “m” or “i”)
letter = input(“write a letter: ”). lower()

Even though I input “m” or “i” the code enters the loop!

Answer 1

letter = "niiii"
while letter not in ["m","i"]:
letter = input("only m or i: ")
print(letter)

Answer 2

Actually solved it with a “while True” loop.