t = int(input())

for i in range(t):
	x, y = map(int, input().split())
	if(x - y > 1):
		print('YES')
	else:
		print('NO')

#include <bits/stdc++.h>

using namespace std;

#define forn(i, n) for (int i = 0; i < int(n); i++)

const int N = 100 * 1000 + 13;

int n, r;
int a[N];

void solve() {
	scanf("%d%d", &n, &r);
	forn(i, n) scanf("%d", &a[i]);
	
	sort(a, a + n);
	n = unique(a, a + n) - a;
	
	int ans = 0;
	for (int i = n - 1; i >= 0; i--) 
		ans += (a[i] - ans * r > 0);

	printf("%d\n", ans);
}

int main() {
	int q;
	scanf("%d", &q);
	forn(i, q) solve();
}

#include<bits/stdc++.h>

using namespace std;

#define fore(i, l, r) for(int i = int(l); i < int(r); i++)
#define sz(a) int((a).size())

#define x first
#define y second

const int INF = int(1e9);

int h, n;
vector<int> p;

inline bool read() {
	if(!(cin >> h >> n))
		return false;
	p.resize(n);
	fore(i, 0, n)
		cin >> p[i];
	return true;
}

inline void solve() {
	int ans = 0;
	
	int lf = 0;
	fore(i, 0, n) {
		if (i > 0 && p[i - 1] > p[i] + 1) {
			if (lf > 0)
				ans += (i - lf) & 1;
			else
				ans += 1 - ((i - lf) & 1);
			lf = i;
		}
	}
	if (p[n - 1] > 1) {
		if (lf != 0)
			ans += (n - lf) & 1;
		else
			ans += 1 - ((n - lf) & 1);
	}
	
	cout << ans << endl;
}

int main() {
#ifdef _DEBUG
	freopen("input.txt", "r", stdin);
#endif
	ios_base::sync_with_stdio(false);
	cin.tie(0), cout.tie(0);
	cout << fixed << setprecision(15);
	
	int tc; cin >> tc;
	while(tc--) {
		read();
		solve();
	}
	return 0;
}

n = int(input())
s = input()
res = n * (n - 1) // 2

for x in range(2):
	cur = 1
	for i in range(1, n):
		if s[i] == s[i - 1]:
			cur += 1
		else:
			res -= cur - x
			cur = 1
	s = s[::-1]

print(res) 

#include <bits/stdc++.h>

using namespace std;

void upd(int &a, int b){
	a = min(a, b);
}

const int N = 20;
const int M = (1 << N) + 55;
const int INF = int(1e9) + 100;

int a, n;
string s;
int cnt[N][N];
int d[M][N];
int dp[M];
int cntBit[M];
int minBit[M];

int main() {	
	cin >> n >> a >> s;
	
	int B = (1 << a) - 1;
	for(int i = 1; i < s.size(); ++i){
		++cnt[s[i] - 'a'][s[i - 1] - 'a'];
		++cnt[s[i - 1] - 'a'][s[i] - 'a'];
	}
	for(int i = 0; i < M; ++i)
		dp[i] = INF;
	dp[0] = 0;
	for(int msk = 1; msk < M; ++msk){
		cntBit[msk] = 1 + cntBit[msk & (msk - 1)];
		for(int i = 0; i < N; ++i) if((msk >> i) & 1){
			minBit[msk] = i;
			break;
		}
	}
	for(int msk = 1; msk < M; ++msk)
		for(int i = 0; i < a; ++i){
			int b = minBit[msk];
			d[msk][i] = d[msk ^ (1 << b)][i] + cnt[i][b];		
		}

	for(int msk = 0; msk < (1 << a); ++msk){
		for(int i = 0; i < a; ++i){
			if((msk >> i) & 1) continue;
			//i -> x
			int pos = cntBit[msk];
			int nmsk = msk | (1 << i);
			upd(dp[nmsk], dp[msk] + pos * (d[msk][i] - d[B ^ nmsk][i]));
		}
	}	

	cout << dp[B] << endl;
	return 0;
} 

#include <bits/stdc++.h>

using namespace std;

const int N = int(3e5) + 99;

int n;
vector <int> g[N];
int d[N];
int dp[N][2];

void dfs(int v, int p){
	vector <int> d1;
	dp[v][1] = d[v] - 1;
	for(auto to : g[v]){
		if(to == p) continue;
		dfs(to, v);
		dp[v][0] = max(dp[v][0], dp[to][0]);
		if(g[to].size() > 1){
			d1.push_back(dp[to][1]);
			dp[v][1] = max(dp[v][1], d[v] + dp[to][1] - 1);	
		}
	}

	sort(d1.rbegin(), d1.rend());
	int x = d[v] + 1;
	for(int i = 0; i < 2; ++i)
		if(i < d1.size())
			x += d1[i];
    dp[v][0] = max(dp[v][0], x);
}

int main() {	
    int q;
    scanf("%d", &q);
    for(int qc = 0; qc < q; ++qc){
    	scanf("%d", &n);
    	for(int i = 0; i < n; ++i){
    	    g[i].clear();
    	    d[i] = 0;
    	    dp[i][0] = dp[i][1] = 0;
    	}
    	for(int i = 0; i < n - 1; ++i){
    		int u, v;
    		scanf("%d %d", &u, &v);
    		--u, --v;
    		g[u].push_back(v), g[v].push_back(u);
    	}
    
        if(n <= 2){
            printf("%d\n", n);
            continue;
        }
        
    	for(int v = 0; v < n; ++v){
    		//d[v] = 1;
    		//for(auto to : g[v])	
    		//	d[v] += g[to].size() == 1;
    		d[v] = g[v].size();
    	}
        
        int r = -1;
        for(int v = 0; v < n; ++v)
            if(g[v].size() != 1)
                r = v;
                
    	dfs(r, r);
    	printf("%d\n", dp[r][0]);
    }
	return 0;
}                             	

#include <bits/stdc++.h>

using namespace std;

#define x first
#define y second
#define mp make_pair
#define forn(i, n) for (int i = 0; i < int(n); ++i)

typedef long long li;
typedef pair<int, int> pt;

const int N = 500 * 1000 + 13;

int n, m, c, c0;
pair<int, pt> a[N];

li solve() {
	scanf("%d%d%d%d", &n, &m, &c, &c0);
	forn(i, n) scanf("%d%d%d", &a[i].x, &a[i].y.x, &a[i].y.y);
	a[n++] = mp(m, mp(0, 0));
	sort(a, a + n);

	int sum = c0;
	map<int, int> q;
	q[0] = c0;
	
	li ans = 0;
	forn(i, n) {
		int x = a[i].x;
		int cnt = a[i].y.x;
		int cost = a[i].y.y;
	
		int dist = x - (i ? a[i - 1].x : 0);
		while (!q.empty() && dist > 0) {
			int can = min(q.begin()->y, dist);
			ans += q.begin()->x * 1ll * can;
			sum -= can;
			dist -= can;
			q.begin()->y -= can;
			if (q.begin()->y == 0) q.erase(q.begin());
		}
		
		if (dist > 0) 
			return -1;
		
		int add = min(c - sum, cnt);
		sum += add;
		
		while (add < cnt && !q.empty() && q.rbegin()->x > cost) {
			if (cnt - add >= q.rbegin()->y) {
				add += q.rbegin()->y;
				q.erase(--q.end());
			} else {
				q.rbegin()->y -= cnt - add;
				add = cnt;
			}
		}
		
		q[cost] += add;
	}
	
	return ans;
}

int main() {
	int q;
	scanf("%d", &q);
	forn(i, q) printf("%lld\n", solve());
}