30 lines
704 B
Python
30 lines
704 B
Python
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#!/usr/bin/env python
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import sys
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from collections.abc import Iterator
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Group = tuple[str, str, str]
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def solve(input: list[str]) -> int:
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def score(lines: Group) -> int:
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common_items = set(lines[0]) & set(lines[1]) & set(lines[2])
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assert len(common_items) == 1 # Sanity check
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common = common_items.pop()
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return common.isupper() * 26 + ord(common.lower()) - ord("a") + 1
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def iter_3() -> Iterator[Group]:
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args = [iter(input)] * 3
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yield from zip(*args, strict=True) # type: ignore
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return sum(map(score, iter_3()))
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def main() -> None:
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input = sys.stdin.read().splitlines()
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print(solve(input))
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if __name__ == "__main__":
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main()
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