n = range(0, 100)
for six in range(0, 100, 6)
	for nine in range(0, 100, 9)
		for twenty in range(0, 100, 20)
			mcnuggets = six + nine + twenty
			ix = n.indexOf(mcnuggets)
			if ix != null then n.remove(ix)
		end for
	end for
end for

print "The largest non-McNugget number is " + n[-1]