- #include <bits/stdc++.h> 
- using namespace std; 
-   
- using ll = long long; 
-   
- void solve() { 
- 	ll x, y; 
- 	cin >> x >> y; 
- 	if (x - y != 1) { 
- 		cout << "YES" << endl; 
- 	} else cout << "NO" << endl; 
- } 
-   
- int main() { 
- 	int t; 
- 	cin >> t; 
- 	while (t--) solve(); 
- } 
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