Same item?
Write same_item(a, b) that returns True if the two item names are the
same, ignoring whether letters are capitals or not.
same_item("bread", "bread") -> True
same_item("Bread", "bread") -> True
same_item("bread", "milk") -> False
You can turn a string into all lowercase with .lower(), like a.lower().
Methods get a full page later; for now, use that one.
def same_item(a, b):
...