# 话不多说,看代码 import re def my_func(in_string): res = [] res2 = [] for i in in_string: if i.isalpha(): res.append(i) res2.append("") else: res2.append(i) res.sort(key=lambda x:x.lower()) start = 0 for num, value in enumerate(res2): if value == "": res2[num] = res[start] start += 1 return "".join(res2) while True: try: print(my_func(input())) except (EOFError, KeyboardInterrupt): break