import sys while True: try: s1 = input().strip() s2 = input().strip() #从短的字符串中获取子串,看是否在长串里 if len(s1) > len(s2): s1, s2 = s2, s1 s_len = len(s1) test_len = s_len found = False #从最长的算起,如果在长串里就是最长的 while test_len > 0: for i in range(s_len - test_len + 1): if s1[i:i + test_len] in s2: print(s1[i:i + test_len]) found = True break if found: break test_len -= 1 except: # print(sys.exc_info()) break