// halozati.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <queue>

#define ll long long 
using namespace std;
ll n, m, kezd, maxim;
struct adat
{
    ll lep = 0, lat = 0, ert = -1;
    vector<pair<ll, ll>>sz;
};
vector<adat>x;
struct ut
{
    ll  hova,mini;
};
priority_queue<ut>v;
bool operator<(const ut& a, const ut& b)
{
    return a.mini < b.mini;
}

int main()
{
    cin >> n >> m >> kezd >> maxim;
    x.resize(n + 1);
    for (int i = 1; i <= m; ++i)
    {
        ll a, b, c;
        cin >> a >> b >> c;
        x[a].sz.push_back({ b,c });
        x[b].sz.push_back({ a,c });
    }

    v.push({ kezd,100001 });
    while (!v.empty())
    {
        ut akt = v.top();
        while (x[akt.hova].lat && !v.empty())
        {
            akt = v.top();
            v.pop();
        }
        if (v.empty())break;
        x[akt.hova].lat = 1;
        x[akt.hova].ert = akt.mini;
        for (auto& e : x[akt.hova].sz)
        {
            if (!x[e.first].lat && x[akt.hova].lep + 1 <= maxim)
            {
                ll a = min(x[akt.hova].ert, e.second);
                if (a > x[e.first].ert)
                {
                    x[e.first].lep = x[akt.hova].lep + 1;
                    x[e.first].ert = min(x[akt.hova].ert, e.second);
                    v.push({ e.first,x[e.first].ert });
                }
            }
        }
    }
    for (int i = 1; i <= n; ++i)
    {
        if (i == kezd)cout << "0\n";
        else cout << x[i].ert << "\n";
    }
    return 0;
}

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// Debug program: F5 or Debug > Start Debugging menu

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