题解 | #字符串排序#

while True:
    try:
        str_words = input()
        a= ''
        for word in str_words:
            if word.isalpha():
                a+=word
        b= sorted(a, key=str.upper)
        s=''
        t=0
        for word in str_words:
            if word.isalpha():
                s+=b[t]
                t+=1
            else:
                s+=word
        print(s)
    except:
        break