#include "iostream"

 #include "cstdio"

 using namespace std;

 const int maxn=;

 int a[maxn];

 int n,l,r,x;

 int main()

 {

     while(cin>>n>>l>>r>>x)

     {

         for(int i=;i<n;i++)

             cin>>a[i];

         int cnt=;

         for(int i=;i<(<<n);i++){

             int sum=;

             int maxn=;

             int minn=<<;

             for(int j=;j<n;j++){

                 if(i&(<<j)){

                     sum+=a[j];

                     maxn=max(maxn,a[j]);

                     minn=min(minn,a[j]);

                 }

             }

             if(sum>=l&&sum<=r&&(maxn-minn)>=x) cnt++;

         }

         cout<<cnt<<endl;

     }

 }