求第二题，18%不知道为啥😢 n=int(input()) loop=n output = [] while(loop>0): motivation_list=input() found = False for j in range(len(motivation_list)): if(found == False and motivation_list[j]!=" " and motivation_list[j] not in output): output.append(motivation_list[j]) found = True loop=loop-1 for i in output: print(i)