def main():
	x = (1,2,3) #immutable
	print(type(x), x)

if __name__ == '__main__':
		main()

		#x=[1,2,3,4] - mutable
		#def main ():
			#x = "string"
			#for i in x:
				#print (i)
				#if __name__ == '__main__':
				#	main()
