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()
res = ''
for c in s:
if s.count(c) == 1:
res = c
break
if len(res) > 0:
print(res)
else:
print('-1')
except:
break