#include <bits/stdc++.h>
using namespace std;
#define int long long
const int mod = 1e9 + 9;
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int n, d; cin >> n >> d;
vector<int> a(n);
for (int i = 0; i < n; i++) cin >> a[i];
sort(a.begin(), a.end());
int res = 1;
for (int l = 0, r = 0; l < n; l++) {
while(r < n - 1 && a[r + 1] - a[l] <= d) r++;
(res *= (r - l + 1)) %= mod;
}
cout << res;
}
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