#include <bits/stdc++.h>
#define MOD 32767
using namespace std;
int n,s,i,v[1030],sol,j,k;
vector<int>hs[MOD+10];
vector <int>:: iterator it;
class InputReader {
    public:
        InputReader() {}
        InputReader(const char *file_name) {
            input_file = fopen(file_name, "r");
            cursor = 0;
            fread(buffer, SIZE, 1, input_file);
        }
        inline InputReader &operator >>(int &n) {
            while(buffer[cursor] < '0' || buffer[cursor] > '9') {
                advance();
            }
            n = 0;
            while('0' <= buffer[cursor] && buffer[cursor] <= '9') {
                n = n * 10 + buffer[cursor] - '0';
                advance();
            }
            return *this;
        }
    private:
        FILE *input_file;
        static const int SIZE = 1 << 17;
        int cursor;
        char buffer[SIZE];
        inline void advance() {
            ++ cursor;
            if(cursor == SIZE) {
                cursor = 0;
                fread(buffer, SIZE, 1, input_file);
            }
        }
};
int main()
{
    InputReader f ("oite.in");
    freopen("oite.out","w",stdout);
    f>>n>>s;
    for(i=1; i<=n; ++i)
        f>>v[i];
    for(i=1; i<=n; ++i)
    {
        for(j=i+1; j<=n; ++j)
            if(s-v[i]-v[j]>=0)
                ///        for(k=0; k<hs[(s-v[i]-v[j])%MOD].size(); ++k)
                ///          if(hs[(s-v[i]-v[j])%MOD][k]==s-v[i]-v[j])++sol;
                for(it=hs[(s-v[i]-v[j])%MOD].begin(); it<hs[(s-v[i]-v[j])%MOD].end(); ++it)
                    if(*it==s-v[i]-v[j])++sol;
        for(j=1; j<i; ++j)
            hs[(v[i]+v[j])%MOD].push_back(v[i]+v[j]);
    }
    printf("%d\n",sol);
    return 0;
}