How can I make tuples a list of possible inputs?

Question

Hi Im kind of new so I dont really know what I did wrong here

weight_Number = input('Weight: ')
kg_lb = input("(K)g or (L)bs: ")
kg_list = ('k', 'K', 'kg', 'Kg', 'KG', 'Kilogram', 'kilogram', 'Kilograms', 'kilograms')
lbs_list = ('l', 'L', 'lbs', 'Lbs', 'LBS', 'Pounds', 'pounds', 'pound', 'Pound')

if kg_lb == kg_list:
    print(int(weight_Number) * 2.205)
elif kg_lb == lbs_list:
    print(int(weight_Number) / 2.205)

How do I make it so that the kg and lb list are possible choices which can trigger the code?