题解 | #字符串排序#

while True:
    try:
        # 截取并排序
        s = input()
        a = ""
        for x in s:
            if x.isalpha():
                a += x
        sort_a = sorted(a, key=lambda x: x.upper())

        b = ""
        pos = 0
        for x in s:
            if x.isalpha():
                b += sort_a[pos]
                pos += 1
            else:
                b += x
        print(b)
    except:
        break