#include<stdio.h>
long long n,m,a[1025],i,j,k,l,nr;
int MAX(int x,int y)
{return x>y?x:y;}
int main()
{freopen("oite.in","r",stdin);
 freopen("oite.out","w",stdout);
 scanf("%lld %lld",&n,&m);
 if(m>200000000) return 0;
 for(i=1;i<=n;i++)
  scanf("%lld",&a[i]);
 for(i=1;i<=n-3;i++)
  for(j=i+1;j<=n-2;j++)
   for(k=j+1;k<=n-1;k++)
    for(l=k+1;l<=n;l++)
	 if(a[i]+a[j]+a[k]+a[l]==m) nr++;
 printf("%lld",nr);
 fclose(stdout);
 return 0;}