21 lines
436 B
Python
21 lines
436 B
Python
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#!/bin/python
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ALL_ANSWERS = set([i for i in "abcdefghijklmnopqrstuvwxyz"])
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with open("input", "r") as input:
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sum = 0
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answers = set(ALL_ANSWERS)
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for line in input:
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line = line.strip()
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if line == "":
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sum += len(answers)
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answers = set(ALL_ANSWERS)
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continue
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answers = answers.intersection(set([char for char in line]))
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sum += len(answers)
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print(sum)
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