题解 | #图片整理#

    try:
        s = input()
        s = [[s[i:i+1], ord(s[i:i+1])] for i in range(len(s))]
        r = ""
        for k, _ in sorted(s, key=lambda x:x[1]):
            r += str(k)
        print(r)
    except:
        break