#include <iostream>
#include <map>
#include <vector>

using namespace std;

void spread(unsigned from, unsigned d, std::vector<unsigned> & sick, std::vector< std::vector<std::pair<unsigned, unsigned> > > &cityMap) {
	std::vector<unsigned> toVisit;
	for (std::vector<std::pair<unsigned, unsigned> >::iterator i=cityMap[from].begin();
		i != cityMap[from].end(); ++i) {
		if (i->second <= d) {
			sick[i->first] = d;
			toVisit.push_back(i->first);
		}
	}
	for (std::vector<unsigned>::iterator i = toVisit.begin(); i != toVisit.end(); ++i) {
		spread(*i, d-1, sick, cityMap);
	}
}

int main(int argc, char *argv[]) {

	while (1) {
		unsigned cityCnt, pathCnt, baseCnt, dist;
		cin >> cityCnt;
		cin >> pathCnt;
		cin >> baseCnt;
		cin >> dist;
		if ((cityCnt + pathCnt + baseCnt +dist) == 0) break;
		std::vector<unsigned> sick(cityCnt+1, 0);
		std::vector< std::vector<std::pair<unsigned, unsigned> > > cityMap(cityCnt+1);
		for (unsigned i = 0; i<pathCnt ; ++i) {
			unsigned from, to, d;
			cin >> from;
			cin >> to;
			cin >> d;
			//cout << from << " " << to << endl;
			cityMap[from].push_back(make_pair(to,d));
			cityMap[to].push_back(make_pair(from, d));
		}
		for (unsigned i = 0; i < baseCnt; ++i) {
			int cityNo;
			cin >> cityNo;
			//cout << cityNo << endl;
			sick[cityNo] = dist;
			spread(cityNo, dist-1, sick, cityMap);
			unsigned ok = 0;
			for (std::vector<unsigned>::iterator j = sick.begin()+1; j!=sick.end(); ++j) if (*j==0) ++ok; 
			cout << ok << endl;
		}
		cout << endl;
		//std::string s;
		//cin >> s;

		//cout << cityCnt << " " << pathCnt << " " << baseCnt << " d:" << dist << endl;
		//cout << "'" << s << "'" << endl;
		//break;
	}

	return 0;
}