题解 | #字符串排序#

while 1:
    try:
        s = input()
        a = ''
        for i in s:
            if i.isalpha():
                a += i
        b = sorted(a,key = str.upper)
        
        index = 0
        res= ''
        for i in range(len(s)):
            if s[i].isalpha():
                res += b[index]
                index += 1
            else:
                res += s[i]
        print(res)


    except:
        break