#include <bits/stdc++.h>
using namespace std;
#define rep(i, x, limit) for (long long i = (long long)x; i < (long long)limit; i++)
#define REP(i, x, limit) for (long long i = (long long)x; i <= (long long)limit; i++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define el '\n'
#define spa " "
#define Yes cout << "Yes" << el
#define No cout << "No" << el
#define YES cout << "YES" << el
#define NO cout << "NO" << el
#define eps (1e-10)
#define Equals(a,b) (fabs((a) - (b)) < eps )
#define debug(x) cerr << #x << " = " << x << el
using ll = long long;
using ull = unsigned long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using vi = vector<int>;
using vl = vector<ll>;
using vvl = vector<vector<ll>>;
using vs = vector<string>;
using vb = vector<bool>;
const double pi = 3.141592653589793238;
const int inf = 1073741823;
const ll infl = 1LL << 60;
const string ABC = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string abc = "abcdefghijklmnopqrstuvwxyz";
const ll MOD = 998244353;
#include<atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using vm = vector<mint>;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  ll n,m,l,s,e;cin>>n>>m>>l>>s>>e;
  vector<vector<pll>> G(n);
  rep(i,0,m){
    ll a,b,t;cin>>a>>b>>t;
    a--;b--;
    G[a].push_back({b,t});
    G[b].push_back({a,t});
  }
  vl T(l);
  rep(i,0,l)cin>>T[i];
  for(auto &t:T)t--;
  vl dist1(n,infl),dist2(n,infl);
  priority_queue<pll,vector<pll>,greater<pll>> pq;
  pq.push({0,0});
  while(!pq.empty()){
    auto[cost,now]=pq.top();pq.pop();
    if(dist1[now]<=cost)continue;
    dist1[now]=cost;
    for(auto [to,d]:G[now]){
      if(dist1[to]>cost+d){
        pq.push({cost+d,to});
      }
    }
  }
  pq.push({0,n-1});
  while(!pq.empty()){
    auto[cost,now]=pq.top();pq.pop();
    if(dist2[now]<=cost)continue;
    dist2[now]=cost;
    for(auto [to,d]:G[now]){
      if(dist2[to]>cost+d){
        pq.push({cost+d,to});
      }
    }
  }
  ll ans=infl;
  for(auto t:T){
    if(dist1[t]<s+e){
      ans=min(ans,max(s+1,dist1[t]+1)+dist2[t]);
    }
  }
  if(ans==infl)ans=-1;
  cout<<ans<<el;
}