#include <bits/stdc++.h>
#define MOD 7919
#define NMAX 1024
using namespace std;
vector <int> Hash[MOD + 5];
int vect,v[NMAX+5],Sol,n,lung,x;
inline void checkhash(int nr)
{
    int x = nr%MOD;
    for (auto it = Hash[x].begin(); it != Hash[x].end(); ++it)
        if (*it==nr)++Sol;
    return ;
}
int main()
{
    freopen("oite.in","r",stdin);
    freopen("oite.out","w",stdout);
    scanf("%d %d", &n,&lung);
    for (int i = 1; i<=n; ++i)
    {
        scanf("%d", &x);
        if (x<=lung)
            v[++vect] = x;
    }
    for (int i = 1; i<=vect; ++i)
    {
        for (int j = i+1; j<=vect; ++j)
        {
            int ramas = lung - v[i]-v[j];
            if (ramas<=0)continue;
            checkhash(ramas);
        }
        for (int j = 1; j<i; ++j)
            Hash[(v[i]+v[j])%MOD].push_back(v[i]+v[j]);
    }
    printf("%d", Sol);
    return 0;
}