21 lines
384 B
Python
21 lines
384 B
Python
lines = (set([c for c in x.strip()]) for x in open("input.txt"))
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current = set()
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count = 0
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restart = True
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for line in lines:
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if len(line) == 0:
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count += len(current)
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current = set()
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restart = True
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elif restart:
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current = line
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restart = False
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else:
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current = current.intersection(line)
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count += len(current)
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print(count)
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