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- number = int(input())
- s = set()
- for i in range(number):
- prod = input()
- s.add(prod)
- number = int(input())
- for j in range(number):
- number_2 = int(input())
- for f in range(number_2):
- prod = input()
- s.discard(prod)
- for d in s:
- print(d)
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