#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001

int main(){
	
	vector<pair<int,int>> p(1,make_pair(0,0));
	
	rep(_,3){
		vector<pair<int,int>> np;
		rep(i,p.size()){
			np.push_back(p[i]);
			for(int j=-2;j<=2;j++){
				for(int k=-2;k<=2;k++){
					bool f = false;
					if(abs(j)==1&&abs(k)==2)f = true;
					if(abs(k)==1&&abs(j)==2)f = true;
					if(!f)continue;
					np.emplace_back(p[i].first+j,p[i].second+k);
				}
			}
		}
		swap(p,np);
	}
	
	sort(p.begin(),p.end());
	int x,y;
	cin>>x>>y;
	
	rep(i,p.size()){
		if(p[i].first==x&&p[i].second==y){
			cout<<"YES"<<endl;
			return 0;
		}
	}
	
	cout<<"NO"<<endl;
	
	return 0;
}