s = input() for i in s : if not i.isdigit(): s = s.replace(i,' ') s = s.split(' ') m = 0 res = '' for i in s: # s= ['8', '72', '6', '5', '98', '65', '1', '2'] if len(i) > m: m = len(i) for i in s: if len(i) == m: res = res + i # 字符串连接 print...