#include <cassert>
#include <cmath>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <limits.h>
#include <map>
#include <queue>
#include <set>
#include <string.h>
#include <vector>

using namespace std;
typedef long long ll;

const ll MOD = 1000000007;

int main() {
  int N, K;
  cin >> N >> K;
  vector<int> A(N);

  for (int i = 0; i < N; ++i) {
    cin >> A[i];
  }

  int LIM = N * 100;
  ll dp[K + 1][N * 100 + 1];
  memset(dp, 0, sizeof(dp));
  dp[0][0] = 1;

  for (int i = 0; i < N; ++i) {
    int a = A[i];

    for (int k = i; k >= 0; --k) {
      for (int j = 0; j <= 100 * i; ++j) {
        if (dp[k][j] == 0) continue;

        int n = min(LIM, j + a);
        dp[k + 1][n] += dp[k][j];
        dp[k + 1][n] %= MOD;
      }
    }
  }

  ll ans = 0;

  for (int i = 1; i <= N; ++i) {
    for (int j = i * K; j <= 100 * N; ++j) {
      ans += dp[i][j];
      ans %= MOD;
    }
  }

  cout << ans << endl;

  return 0;
}