题解 | #找出字符串中第一个只出现一次的字符#
找出字符串中第一个只出现一次的字符
http://www.nowcoder.com/practice/e896d0f82f1246a3aa7b232ce38029d4
a = input()
for x in a:
if a.count(x)==1:
print(x)
break
else:
print('-1')
for x in a:
if a.count(x)==1:
print(x)
break
else:
print('-1')
