def def def def def def def def def def def def def def
main main main main main main main main main main main
for for for for for for for for for for for for for for
while while while while while while while while while
break break break break break break break break break
continue continue continue continue continue continue
class class class class class class class class class
print print print print print print print print print
self self self self self self self self self self self
if __name__=='__main__': if __name__=='__main__':
import import import import import import import import
read read read read read read read read read read read
write write write write write write write write write
readline readline readline readline readline readline
close close close close close close close close close
open open open open open open open open open open open