#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int, int> pii;
const int MXN = 100005;
// int n, m, s, t, u, v, father[MXN], du[MXN], dv[MXN], uu = LLONG_MAX, vv = LLONG_MAX;
int n, m, s, t, u, v, ds[MXN], dv[MXN], ans = LLONG_MAX;
vector<pii> edge[MXN];
vector<int> path, father[MXN];
bitset<MXN> b;
// void GET_PATH() {
// b.reset();
// priority_queue<pair<int, pii>, vector<pair<int, pii>>, greater<pair<int, pii>>> pq;
// pq.push({0, {0, s}});
// while (pq.size()) {
// pair<int, pii> now = pq.top();
// pq.pop();
// if (b[now.second.second]) continue;
// b[now.second.second] = true;
// father[now.second.second] = now.second.first;
// for (auto &i : edge[now.second.second]) {
// if (b[i.first]) continue;
// pq.push({now.first + i.second, {now.second.second, i.first}});
// }
// }
// int now = t;
// path.push_back(now);
// while (now != s) {
// now = father[now];
// path.push_back(now);
// }
// }
void DIJKSTRA(int start, int *arr) {
b.reset();
priority_queue<pii, vector<pii>, greater<pii>> pq;
pq.push({0, start});
while (pq.size()) {
pii now = pq.top();
pq.pop();
if (b[now.second]) continue;
b[now.second] = true;
arr[now.second] = now.first;
for (auto &i : edge[now.second]) {
if (b[i.first]) continue;
pq.push({now.first + i.second, i.first});
}
}
}
void GET_PATH() {
b.reset();
priority_queue<pair<int, pii>, vector<pair<int, pii>>, greater<pair<int, pii>>> pq;
pq.push({0, {s, s}});
while (pq.size()) {
pair<int, pii> now = pq.top();
pq.pop();
// if (b[now.second.second]) continue;
if (b[now.second.second]) {
if (ds[now.second.second] == now.first) father[now.second.second].push_back(now.second.first);
continue;
}
b[now.second.second] = true;
// father[now.second.second] = now.second.first;
ds[now.second.second] = now.first;
father[now.second.second].push_back(now.second.first);
for (auto &i : edge[now.second.second]) {
if (b[i.first]) continue;
pq.push({now.first + i.second, {now.second.second, i.first}});
}
}
// int now = t;
// path.push_back(now);
// while (now != s) {
// now = father[now];
// path.push_back(now);
// }
b.reset();
queue<int> q;
q.push(t);
while (q.size()) {
int now = q.front();
q.pop();
if (b[now]) continue;
b[now] = true;
path.push_back(now);
for (auto &i : father[now]) {
if (b[i]) continue;
q.push(i);
}
}
}
int32_t main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
int x, y, z;
cin >> n >> m >> s >> t >> u >> v;
for (int i = 0; i < m; i++) {
cin >> x >> y >> z;
edge[x].push_back({y, z});
edge[y].push_back({x, z});
}
// GET_PATH();
// DIJKSTRA(u, du);
// DIJKSTRA(v, dv);
// for (auto &i : path) {
// uu = min(uu, du[i]);
// vv = min(vv, dv[i]);
// }
// cout << min(du[v], uu + vv) << endl;
GET_PATH();
DIJKSTRA(v, dv);
for (auto &i : path) {
// cout << i << endl;
ans = min(ans, dv[i]);
}
cout << ans << endl;
return 0;
}
