import sys current_users = ['Niuniu','Niumei','GURR', 'LOLO'] new_users = ['GurR','Niu Ke Le','LoLo','Tuo Rui Chi'] current_users_upper = [] for user in current_users: current_users_upper.append(user.upper()) for user in new_users: if user.upper() in current_users_upper: print('The user name %s has ...