#include<fstream>
using namespace std;
ifstream f("zebughil.in");
ofstream g("zebughil.out");
int t,i,j,gr,k,n,n1,a[20],d[1000000];
int main(){
  for(t=1;t<=3;++t)
  {
  f>>n>>gr;
  for(i=1;i<=n;++i)
  f>>a[i];
  n1=1<<n;
  for(i=0;i<n1;++i)
  {
  d[i]=-1;
  }
  d[0]=gr;
  for(i=1;i<=n;++i)
  {
  for(j=0;j<n1;++j)
  {
  if(d[j]!=-1)
  d[j]=gr;
  for(k=1;k<=n;++k)
  if(j&(1<<(k-1))&&d[j-(1<<(k-1))]-a[k]>d[j])
  d[j]=d[j-(1<<(k-1))]-a[k];
  }
  if(d[n1-1]>-1)
  {
  g<<i<<'\n';
  break;
  }
  }
  }
  return 0;
}