#include<iostream>
#include<algorithm>
using namespace std;
using lint=int64_t;

int main()
{
	string N,M;
	cin >> N >> M;
	if((N[N.size()-1]-'0'+M[M.size()-2]-'0')%2==0)
		cout << "Yes";
	else
		cout << "No";
	cout << endl;
	return 0;
}