A_Prime_Subtraction.cpp

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()
const long double EPS = 1e-14;
const int maxn = 100500;
const int mod = 1e9 + 7;


signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int q;
    cin >> q;
    while(q--){
        int x, y;
        cin >> x >> y;
        if(x == y + 1) cout << "NO\n";
        else cout << "YES\n";
    }

    return 0;
}