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
while True:
try:
s = input()
for i in s:
if s.count(i) == 1:
print(i)
break
else:
print('-1')
except:
break