#include <bits/stdc++.h>
using namespace std;
int main() {
	int q;
	cin >> q;
	for(int i = 0; i < q; ++i) {
		int a, b;
		cin >> a >> b;
		if(a > b) swap(a, b);
		// now we know that a < b
		if(a + 2 == b)
			puts("YES"); // two consecutive odd or even numbers
		else if(a % 2 == 1 && a + 1 == b)
			puts("YES");
		else
			puts("NO");
	}
}