题解 | #字符串排序#
字符串排序
https://www.nowcoder.com/practice/5190a1db6f4f4ddb92fd9c365c944584
s = input()
s_alp = ""
for char in s:
if char.isalpha():
s_alp += char
sorted_s_alp = sorted(s_alp, key=str.lower)
# idx for sorted_s_alp
idx = 0
res = ""
for i in range(len(s)):
if s[i].isalpha():
res += sorted_s_alp[idx]
# idx only move with alp char
idx += 1
else:
res += s[i]
print(res)