h={[0,0]=>1}
A=[[-2,-1],[-2,1],[-1,-2],[-1,2],[2,-1],[2,1],[1,-2],[1,2]]
(1..3).each{|n|
	A.repeated_combination(n){|a|h[a.transpose.map{|e|e.reduce(:+).abs}]=1}
}
B=h.keys.sort.select{|x,y|x<=y}.map(&:join)
#p B
p B.include?(gets.split.map{|e|e.to_i.abs}.minmax*'')?:YES: :NO