def knight(x,y,n)
	case n
	when 0
		x -= 2
		y -= 1
	when 1
		x -= 2
		y += 1
	when 2
		x -= 1
		y -= 2
	when 3
		x -= 1
		y += 2
	when 4
		x += 1
		y -= 2
	when 5
		x += 1
		y += 2
	when 6
		x += 2
		y -= 1
	when 7
		x += 2
		y += 1
	end
	return x,y
end

X,Y = gets.split.map(&:to_i)
x = y = tmp1_x = tmp1_y = tmp2_x = tmp2_y = 0
if X.abs > 6 || Y.abs > 6
	puts "NO"
else
	8.times{|i|
		x = y = 0
		tmp1_x,tmp1_y = knight(x,y,i)
		x,y = tmp1_x,tmp1_y
		if x == X && y == Y
			puts "YES"
			exit
		end
		8.times{|j|
			x,y = tmp1_x,tmp1_y
			tmp2_x,tmp2_y = knight(x,y,j)
			x,y = tmp2_x,tmp2_y
			if x == X && y == Y
				puts "YES"
				exit
			end
			8.times{|k|
				x,y = tmp2_x,tmp2_y
				x,y = knight(x,y,k)
				if x == X && y == Y
					puts "YES"
					exit
				end
			}
		}
	}
	puts "NO"
end