27 lines
619 B
Python
27 lines
619 B
Python
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#!/usr/bin/env python
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import itertools
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import sys
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def solve(input: str) -> str:
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def find_box_ids(boxes: list[str]) -> str:
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for lhs, rhs in itertools.combinations(boxes, 2):
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assert len(lhs) == len(rhs) # Sanity check
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for i in range(len(lhs)):
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if lhs[:i] == rhs[:i] and lhs[i + 1 :] == rhs[i + 1 :]:
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return lhs[:i] + lhs[i + 1 :]
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assert False # Sanity check
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boxes = input.splitlines()
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return find_box_ids(boxes)
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def main() -> None:
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input = sys.stdin.read()
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print(solve(input))
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if __name__ == "__main__":
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main()
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