#include <iostream>
using namespace std;
typedef long long ll;
int N;
int ary_g[200][200];
ll r_max=0;
void calc(int p,ll r,int m,ll ary_r[]){
  for(int i=0;i<N;++i){
    if(i==p) continue;
    if(ary_g[p][i]){
      int m2=m-ary_g[p][i];
      if(m2<0) continue;
      ll r2=r+ary_r[i];
      ll ary_r2[N];
      for(int i2=0;i2<N;++i2){
        ary_r2[i2]=ary_r[i2];
      }
      ary_r2[i]=0;
      if(i==0 && r2>r_max) r_max=r2;
      calc(i,r2,m2,ary_r2);
    }
  }
}
int main(){
  int M;
  cin>>N>>M;
  ll ary_r[N];
  for(int i=0;i<N;++i){
    cin>>ary_r[i];
  }
  int A,B,C;
  for(int i=0;i<N-1;++i){
    cin>>A>>B>>C;
    ary_g[A][B]=C;
    ary_g[B][A]=C;
  }
  ll ary_r2[N];
  for(int i=0;i<N;++i){
    ary_r2[i]=ary_r[i];
  }
  ll r=ary_r[0];
  r_max=r;
  ary_r2[0]=0;
  calc(0,r,M,ary_r2);
  cout<<r_max<<endl;
}