#include<fstream>
#include<algorithm>
using namespace std;
int n,i,i1,i2,i3,sum,S,v[1000],p,u,aux,m,k,j;
struct qq
{
	int a;
	int b;
	int c;
	int s;
};
qq elem[1000001];
int cmp(const qq &x,const qq &y)
{
	if(x.s<y.s)
		return 1;
	else
		return 0;
}

int main()
{
	ifstream f("loto.in");
	ofstream g("loto.out");
	f>>n>>sum;
	for(i=1;i<=n;i++)
		f>>v[i];
	for(i=1;i<=n;i++)
		for(i1=1;i1<=n;i1++)
			for(i2=1;i2<=n;i2++)
			{
				if(v[i]+v[i1]+v[i2]<=sum)
				{
				elem[++k].s=v[i]+v[i1]+v[i2];
				elem[k].a=i;
				elem[k].b=i1;
				elem[k].c=i2;
				}
			}
	sort(elem+1,elem+k+1,cmp);
	for(i=1;i<=k/2;i++)
	{
		for(j=k;j>=k/2;j--)
		{
			p++;
		}
	}
			g<<-1;
			return 0;
}