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

#include <iostream>
#include <vector>
#include <deque>
#include <queue>
#include <algorithm>
#define ll long long

using namespace std;
struct ut
{
    ll hova, hossz;
};
struct adat
{
    bool lat;
    ll tav = LLONG_MIN,lep;
    vector<ut>sz;
};

priority_queue<ut>que;
ut akt;
bool operator<(const ut a, const ut b)
{
    return a.hossz < b.hossz;
}
ll n, i, a, b, c, db,m,k,h;

int main()
{
    cin >> n >> m>>k>>h;
    vector<adat>x(n+1);
    for (i = 1; i <= m; ++i)
    {
        cin >> a >> b >> c;
        x[a].sz.push_back({ b,c });
        x[b].sz.push_back({ a,c });
    }
    que.push({ k,LLONG_MAX });
    while (!que.empty())
    {
        akt = que.top();
        while (!que.empty() && x[akt.hova].lat)
        {
            que.pop();
            if (!que.empty()) akt = que.top();
        }
        //que.pop();
        if (que.empty()) break;
        x[akt.hova].lat = true;
        x[akt.hova].tav = akt.hossz;
        for (auto& e : x[akt.hova].sz)
        {
            if (!x[e.hova].lat && x[e.hova].tav < min(akt.hossz, e.hossz) && x[akt.hova].lep + 1 <= h)
            {
                x[e.hova].tav = min(akt.hossz, e.hossz);
                if(!x[e.hova].lep)x[e.hova].lep = x[akt.hova].lep + 1;
                que.push({ e.hova,min(akt.hossz , e.hossz) });
            }
            else if (x[akt.hova].lep + 1 > h&&!x[e.hova].lat) x[e.hova].tav = -1;
        }
    }
    x[k].tav = 0;
    for (i = 1; i <= n; ++i) cout << x[i].tav << "\n";
    return 0;
}
/*
7 8 1 2
1 2 2
1 5 4
1 3 2
1 4 3
5 4 1
5 3 4
5 6 1
6 7 8

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

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