#include<fstream>
#include<vector>
#define mod 7919
using namespace std;
ifstream f("oite.in");
ofstream g("oite.out");
vector <long> vector_hash[mod];
long long c,l,lana,s,oite[1030];
int main()
{
    f>>c>>l;
    for(int i=1;i<=c;i++)
        f>>oite[i];
    for(int i=1; i<c; i++)
    {
        for(int j = i+1 ; j <= c; j++)
        {
            s = l - oite[i] - oite[j];
            int sum = s % mod;
            if(sum >= 0)
                for(int k = 0; k < vector_hash[sum].size(); k++)
                    if(vector_hash[sum][k] == s)
                        lana++;
        }
        for(int j = 1;j < i;j++)
        {
            long long sum = oite[i]+oite[j];
            vector_hash[sum%mod].push_back(sum);
        }
    }
    g << lana <<"\n";
    return 0;
}