import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] sa = br.readLine().split(" ");
		int n = Integer.parseInt(sa[0]);
		int k = Integer.parseInt(sa[1]);
		sa = br.readLine().split(" ");
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(sa[i]);
		}
		br.close();

		int mod = 1000000007;
		long[][][] dp = new long[n + 1][n + 1][10001];
		dp[0][0][0] = 1;
		for (int i = 0; i < n; i++) {
			int i1 = i + 1;
			for (int j = 0; j <= i; j++) {
				for (int j2 = 0; j2 <= 100 * i; j2++) {
					dp[i1][j][j2] += dp[i][j][j2];
					dp[i1][j + 1][j2 + a[i]] += dp[i][j][j2];
				}
			}
			for (int j = 0; j <= i1; j++) {
				for (int j2 = 0; j2 <= 100 * i1; j2++) {
					dp[i1][j][j2] %= mod;
				}
			}
		}

		long ans = 0;
		for (int j = 1; j <= n; j++) {
			for (int j2 = j * k; j2 <= 10000; j2++) {
				ans += dp[n][j][j2];
			}
		}
		ans %= mod;
		System.out.println(ans);
	}
}