#include <bits/stdc++.h>
#define pb push_back

using namespace std;

ifstream fin("oite.in");
ofstream fout("oite.out");

void debug_out() { cerr << '\n'; }
template <typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << " " << H; debug_out(T...);}
#define dbg(...) cerr << #__VA_ARGS__ << " ->", debug_out(__VA_ARGS__)
#define dbg_v(x, n) do{cerr<<#x"[]: ";for(int _=0;_<n;++_)cerr<<x[_]<<" ";cerr<<'\n';}while(0)
#define dbg_ok cerr<<"OK!\n"

typedef pair<int,int> pii;
typedef long long int ll;
typedef long double ld;

const int DMAX = 1e5+10;

map <ll,int> dp[5];
int V[DMAX];

int n;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int i;
    ll x,suma;

    fin>>n>>suma;
    for(i=1;i<=n;i++){
        fin>>x;
        for(auto& it:dp[3])
            if(x+it.first <= suma)
                dp[4][x+it.first]+=it.second;
        for(auto& it:dp[2])
            if(x+it.first <= suma)
                dp[3][x+it.first]+=it.second;
        for(auto& it:dp[1])
            if(x+it.first <= suma)
                dp[2][x+it.first]+=it.second;
        if(x <= suma)
            dp[1][x]++;
    }
    fout<<dp[4][suma]<<'\n';

    return 0;
}