def Gnum(n1,n2,n3):
	if n1>n2:
             	if n1>n3:
                	print 'n1 is greatest'
		else:
			print 'n3 is greatest'
     	elif n2>n1:
		if n2>n3:
                	print 'n2 is greatest'
		else:
			print 'n3 is greatest'
     


Gnum(5,4,3)
