18 lines
398 B
Python
18 lines
398 B
Python
from sys import stdin
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n=int(stdin.readline().rstrip())
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pattern=""
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plen=0
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for _ in range(n):
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name=stdin.readline().rstrip()
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if plen==0:
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pattern=name
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plen=len(pattern)
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else:
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for i in range(plen):
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if pattern[i]=='?' or pattern[i]==name[i]:
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continue
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else:
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pattern=pattern[:i]+'?'+pattern[i+1:]
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print(pattern) |