[Python] Is there a way to make 2 different strings function when typed? [closed]

I am making my own text app in python and I have this code

def different_string_func_input(prompt, string1, string2):
while True:
custom_input_two = input (prompt)
if string1 in custom_input_two:
return custom_input_two
elif string2 in custom_input_two:
print("Bye!")
exit()
else:
print("Please enter a valid prompt!")


I used the while True loop and when I tested it, it showed me this:

'in ' required string as left operand, not int.
​

It shows up whenever I typed something. Is there a way to fix it?

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