a = 0
sum = 0
for n in 1..12 do

	for i in 1..30 do
		a = i.to_s.split("").map(&:to_i)
		if a.size > 1
			a =	a.first + a.last
		else
			a =	a.first
		end
		
		if n == a
			sum +=1
			puts "a >> #{a}"
		end
	end

end

puts sum