题解 | #字符串排序#

import sys

for line in sys.stdin:
    search1,paixu = [],[]
    a = list(line.strip())
    for i in range(len(a)):
        if a[i].isalpha():
            search1.append(i)
            paixu.append([a[i],i])
        else:
            continue
    re = sorted(paixu,key=lambda x:(x[0].lower(),x[1]))
    for i in range(len(search1)):
        a[search1[i]] = re[i][0]
    print(''.join(a))