from collections import *
import sys
import heapq
from heapq import heapify, heappop, heappush
import bisect
import itertools
from functools import lru_cache
from types import GeneratorType
from fractions import Fraction
import math
import copy
import random

# import numpy as np

# sys.setrecursionlimit(int(1e7))
# @lru_cache(maxsize=None) # CPython特化
# @bootstrap # PyPy特化(こっちのほうが速い) yield dfs(), yield Noneを忘れずに


def bootstrap(f, stack=[]):  # yield
    def wrappedfunc(*args, **kwargs):
        if stack:
            return f(*args, **kwargs)
        else:
            to = f(*args, **kwargs)
            while True:
                if type(to) is GeneratorType:
                    stack.append(to)
                    to = next(to)
                else:
                    stack.pop()
                    if not stack:
                        break
                    to = stack[-1].send(to)
            return to

    return wrappedfunc


dxdy1 = ((0, 1), (0, -1), (1, 0), (-1, 0))  # 上下右左
dxdy2 = (
    (0, 1),
    (0, -1),
    (1, 0),
    (-1, 0),
    (1, 1),
    (-1, -1),
    (1, -1),
    (-1, 1),
)  # 8方向すべて
dxdy3 = ((0, 1), (1, 0))  # 右 or 下
dxdy4 = ((1, 1), (1, -1), (-1, 1), (-1, -1))  # 斜め
INF = float("inf")
_INF = 1 << 60
MOD = 998244353
mod = 998244353
MOD2 = 10**9 + 7
mod2 = 10**9 + 7
# memo : len([a,b,...,z])==26
# memo : 2^20 >= 10^6
# 小数の計算を避ける : x/y -> (x*big)//y  ex:big=10**9
# @:小さい文字, ~:大きい文字,None: 空の文字列
# ユークリッドの互除法：gcd(x,y)=gcd(x,y-x)
# memo : d 桁以下の p 進表記を用いると p^d-1 以下のすべての
#        非負整数を表現することができる
# memo : (X,Y) -> (X+Y,X−Y) <=> 点を原点を中心に45度回転し、√2倍に拡大
# memo : (x,y)のx正から見た偏角をラジアンで(-πからπ]：　math.atan2(y, x)
# memo : a < bのとき ⌊a⌋ ≦ ⌊b⌋

input = lambda: sys.stdin.readline().rstrip()
mi = lambda: map(int, input().split())
li = lambda: list(mi())
ii = lambda: int(input())
py = lambda: print("Yes")
pn = lambda: print("No")
pf = lambda: print("First")
ps = lambda: print("Second")

INF = 10**15
N, M, L, S, E = mi()
TT = S + E
adj = [[] for _ in range(N)]
memo = defaultdict(lambda: INF)
for _ in range(M):
    a, b, t = mi()
    if a == b:
        continue
    a -= 1
    b -= 1
    adj[a].append((t, b))
    adj[b].append((t, a))
for i in range(N):
    adj[i].sort()

dist = [[INF] * 2 for _ in range(N)]
T = li()
T = [t - 1 for t in T]
T = set(T)
pq = []
heappush(pq, (0, 0, 0))
while pq:
    t, node, s = heappop(pq)
    if dist[node][s] < t:
        continue
    dist[node][s] = t
    if node in T and t < TT and s == 0:
        wait = max(0, S - t)
        dist[node][1] = t + wait + 1
        heappush(pq, (dist[node][1], node, 1))
    for w, nxt in adj[node]:
        if dist[nxt][s] <= t + w:
            continue
        if s == 0 and t + w >= TT:
            continue
        dist[nxt][s] = t + w
        heappush(pq, (dist[nxt][s], nxt, s))

if dist[-1][1] == INF:
    print(-1)
else:
    print(dist[-1][1])