#include <bits/stdc++.h>
#include <atcoder/all>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <math.h>
#include <random>
#include <chrono>
#include <cstdint>


using namespace std;
using namespace atcoder;
// using mint = modint998244353;
using mint = modint1000000007;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using vl = vector<long long>;
using vvl = vector<vector<long long>>;
using ll = long long;
template <class T> using max_heap = priority_queue<T>;
template <class T> using min_heap = priority_queue<T, vector<T>, greater<>>;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, f, n) for (int i = (int) f; i < (int)(n); i++)
#define repd(i, n, l) for (int i = (int) n; i >= (int) l; i--)
#define all(p) p.begin(),p.end()
vector<pair<int, int>> dydx{{-1, 0}, {1, 0}, {0, -1 }, {0, 1}};
const ll inf = 1LL << 60;
void print(){ putchar(' '); }
void print(bool a){ printf("%d", a); }
void print(int a){ printf("%d", a); }
void print(unsigned a){ printf("%u", a); }
void print(long a){ printf("%ld", a); }
void print(long long a){ printf("%lld", a); }
void print(unsigned long long a){ printf("%llu", a); }
void print(char a){ printf("%c", a); }
void print(char a[]){ printf("%s", a); }
void print(const char a[]){ printf("%s", a); }
void print(float a){ printf("%.15f", a); }
void print(double a){ printf("%.15f", a); }
void print(long double a){ printf("%.15Lf", a); }
void print(const string& a){ for(auto&& i : a) print(i); }
template<class T> void print(const complex<T>& a){ if(a.real() >= 0) print('+'); print(a.real()); if(a.imag() >= 0) print('+'); print(a.imag()); print('i'); }
template<class T> void print(const vector<T>&);
template<class T, size_t size> void print(const array<T, size>&);
template<class T, class L> void print(const pair<T, L>& p);
template<class T, size_t size> void print(const T (&)[size]);
template<class T> void print(const vector<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }
template<class T> void print(const deque<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }
template<class T, size_t size> void print(const array<T, size>& a){ print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ putchar(' '); print(*i); } }
template<class T, class L> void print(const pair<T, L>& p){ print(p.first); putchar(' '); print(p.second); }
template<class T, size_t size> void print(const T (&a)[size]){ print(a[0]); for(auto i = a; ++i != end(a); ){ putchar(' '); print(*i); } }
template<class T> void print(const T& a){ cout << a; }


int main() {
    int n, m, l;
    ll s, e;
    cin >> n >> m >> l >> s >> e;

    vvl dist(n, vl(2, inf));
    dist[0][0] = 0;
    vector<vector<pair<int, ll>>> G(n);
    vector<vector<bool>> seen(n, vector<bool>(2, false));
    
    rep(i, m){
        int a, b; ll t;
        cin >> a >> b >> t;
        a--, b--;
        G[a].push_back({b, t});
        G[b].push_back({a, t});
    }
    vector<int> T(n, 0);
    rep(i, l){
        int tt; cin >> tt; tt--;
        T[tt] = 1;
    }

    min_heap<tuple<ll, int, int>> hq;
    hq.push({0, 0, 0});
    while (!hq.empty()){
        int now = get<1>(hq.top());
        int f = get<2>(hq.top());hq.pop();
        if (seen[now][f]) continue;
        seen[now][f] = true;

        if (!f && T[now] && dist[now][0] <= s+e){
            if (dist[now][1] > dist[now][0] + 1){
                dist[now][1] = max(dist[now][0] + 1, s+1);
                hq.push({dist[now][1], now, 1});
            }
        }
        for (auto [nxt, nc] : G[now]){
            if (dist[nxt][f] > dist[now][f] + nc && !seen[nxt][f]){
                dist[nxt][f] = dist[now][f] + nc;
                hq.push({dist[nxt][f], nxt, f});
            }
        }
    }
    if (dist[n-1][1] == inf) cout << -1 << endl;
    else cout << dist[n-1][1] << endl;
    return 0;
}