#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
int INF = 5e18+7;
int mod = 1e9+7;
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
long double pi = 3.141592653589793238;
int dp[110][110][10010];
int main() {
    int N,K;
    cin >> N >> K;
    dp[0][0][0] = 1;
    for(int i = 0; i < N; i++) {
        int A;
        cin >> A;
        for(int j = 0; j <= i; j++) {
            for(int k = 0; k <= 10000; k++) {
                dp[i+1][j][k] += dp[i][j][k];
                dp[i+1][j][k] %= mod;
                if(k+A <= 10000) {
                    dp[i+1][j+1][k+A] += dp[i][j][k];
                    dp[i+1][j+1][k+A] %= mod;
                }
            }
        }
    }
    int ans = 0;
    for(int i = 1; i <= N; i++) {
        for(int j = K*i; j <= 10000; j++) {
            ans += dp[N][i][j];
            ans %= mod;
        }
    }
    cout << ans << endl;
}