#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define ertunt return
const int MOD = 998244353;
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
int main() {
ll n, m;
cin >> n >> m;
ll s, t, l, k;
cin >> s >> t >> l >> k;
vector<vector<pair<ll, ll>>> v(n + 1);
for (ll i = 0; i < m; i++) {
ll a, b, w;
cin >> a >> b >> w;
v[a].pb({b, w});
v[b].pb({a, w});
}
cout << v[t].size()+v[s].size()+1;
}
