#include<iostream>
#include<string>
#include<iomanip>
#include<cmath>
#include<vector>
#include<algorithm>
#include<utility>

using namespace std;

#define int long long
#define endl "\n"

constexpr long long INF = (long long)1e18;
constexpr long long MOD = 1'000'000'007; 

struct fast_io {
	fast_io(){
		std::cin.tie(nullptr);
		std::ios::sync_with_stdio(false);
	};
} fio;

signed main(){
	cout<<fixed<<setprecision(10);
	
	int MAX = 101;
	int N, K;
	vector<int> A;
	vector<vector<int>> dp;
	int ans = 0;
	
	cin>>N>>K;
	
	A.resize(N);
	dp.resize(MAX * N, vector<int>(N+2));
	
	for(int i = 0; i < N; i++){
		cin>>A[i];
	}
	
	dp[0][0] = 1;
	
	for(int i = 0; i < N; i++){
		for(int j = MAX * N - 1; j >= 0; j--){
			for(int k = N; k >= 0; k--){
				
				if(j + A[i] < MAX * N) {
					dp[j + A[i]][k + 1] += dp[j][k];
					dp[j + A[i]][k + 1] %= MOD;
				}
			}
		}
	}
	for(int j = MAX * N - 1; j >= 0; j--){
		for(int k = N; k >= 1; k--){
			
			if(j >= k * K) {
				ans += dp[j][k];
				ans %= MOD;
			}
		}
	}
	
	cout<<ans<<endl;
	
	return 0;
}