17 lines
388 B
Python
17 lines
388 B
Python
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import sys
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from collections import defaultdict as DD
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from itertools import combinations as comb
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D = DD(set)
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for i in sys.stdin.read().strip().split('\n'):
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a, b = i.split("-")
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D[a].add(b)
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D[b].add(a)
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for k, v in D.items():
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for i in v:
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w = v - {i}
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if all(b in D[a] for a,b in comb(w,2)):
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print(",".join(sorted({k}|w)))
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#sys.exit(0)
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