def echo(user, lang ,sys):
    print('User: ', user, 'Language: ', lang, 'Platform :', sys)
echo('Mike','Python','Windows')
echo(lang='Python',sys='Mac OS', user='Annie')
def mirror(user='Carole', lang='Python'):
    print('\nUser: ',user,'Language: ',lang)
mirror()
mirror(lang='Java')
mirror(user='Tony')
mirror('Susan','C++')