import java.io.*; import java.util.*; import java.util.function.*; import java.util.stream.*; public class Main { static int[] values; static int[][] dp; static final int MOD = 1000000007; public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int n = sc.nextInt(); int k = sc.nextInt(); int total = 0; values = new int[n]; for (int i = 0; i < n; i++) { values[i] = sc.nextInt() - k; total += Math.max(0, values[i]); } Arrays.sort(values); dp = new int[n][total + 1]; for (int[] arr : dp) { Arrays.fill(arr, -1); } System.out.println((dfw(n - 1, 0) - 1 + MOD) % MOD); } static int dfw(int idx, int v) { if (v < 0) { return 0; } if (idx < 0) { return 1; } if (dp[idx][v] < 0) { dp[idx][v] = (dfw(idx - 1, v) + dfw(idx - 1, v + values[idx])) % MOD; } return dp[idx][v]; } } class Scanner { BufferedReader br; StringTokenizer st = new StringTokenizer(""); StringBuilder sb = new StringBuilder(); public Scanner() { try { br = new BufferedReader(new InputStreamReader(System.in)); } catch (Exception e) { } } public int nextInt() { return Integer.parseInt(next()); } public long nextLong() { return Long.parseLong(next()); } public double nextDouble() { return Double.parseDouble(next()); } public String next() { try { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } } catch (Exception e) { e.printStackTrace(); } finally { return st.nextToken(); } } }