#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);
const int MOD = 1e9 + 7;

int dp[100+1][10000+1];


int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  int n, k;
  cin >> n >> k;
  vector<int> a(n);
  REP (i, n) cin >> a[i];
  
  dp[0][0] = 1;

  REP (x, n) {
    for (int i = n; i > 0; i--) {
      for (int j = 0; j <= 100 * n; j++) {
        if (j - a[x] >= 0) {
          dp[i][j] += dp[i-1][j-a[x]];
          dp[i][j] %= MOD;
        }
      }
    }
  }

  int ret = 0;
  FOR (i, 1, n+1) REP (j, 100 * n + 1) {
    if (j >= i * k) {
      ret += dp[i][j];
      ret %= MOD;
    }
  }

  cout << ret << endl;
  
  return 0;
}