题解 | 茉茉的密码
茉茉的密码
https://www.nowcoder.com/practice/016a87b3015c448da67974d1d731d7ef
n = int(input())
l = []
for i in range(n):
a = input()
l.append(a)
for i in range(ord('a'),ord('z')+1):
i = chr(i)
g = 0
for j in range(n):
if i in l[j]:
g = g + 1
if g == n:
print(i)
break
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