import platform, time
if platform.mac_ver(release='', versioninfo=('', '', ''), machine='') == ('', ('', '', ''), ''):
	print 'No usas mac' 
        
        

elif platform.win32_ver(release='', version='', csd='', ptype='') == ('', ('', '', ''), ''):
        print 'No usas Windows'
        
        
print 'Usas'
print platform.system()



while 1==1:
        time.sleep(1)