#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;

ifstream fin;

class Witness {
public:
	int suspect, place, t1, t2;
	bool trust;
	Witness() {
		trust = true;
	}
};

void checkOut(Witness& w1, Witness& w2) {
	if (w1.suspect != w2.suspect) return;
	if (w1.place == w2.place) return;
	int start = min(w1.t1, w2.t1);
	int end = max(w1.t2, w2.t2);
	for (int i=start; i<=end; i++) {
		if ( (i>=w1.t1 && i<=w1.t2) && (i>=w2.t1 && i<=w2.t2)) {
			w1.trust = false;
			w2.trust = false;
		}
	}
}
void calculate() {
	int susp,witn,locs,crtm;
	Witness witList[200];
	fin>>susp>>witn>>locs>>crtm;
	for (int i=0; i<witn; i++) { //read in data
		fin>>witList[i].suspect>>witList[i].place>>witList[i].t1>>witList[i].t2;
		fin.ignore(1,'\n');
	}
	for (int i=0; i<witn; i++) {
		for (int j=0; j<witn; j++) {
			if (i != j) checkOut(witList[i],witList[j]);
		}
	}
	bool suspected[50];
	for (int i=0; i<50; i++) suspected[i] = true;
	for (int i=0; i<witn; i++) {
		Witness w=witList[i];
		if (w.trust && crtm>=w.t1 && crtm<=w.t2) {
			suspected[w.suspect - 1] = false;
		}
	}
	bool noSusp = true;
	for (int i=0; i<susp; i++) {
		if (suspected[i]) {
			cout<<i+1<<endl;
			noSusp = false;
		}
	}
	if (noSusp) cout<<"No suspect."<<endl;
	cout<<endl;
}

int main() {
	int K;
	fin.open("alibi.in");
	fin>>K;
	fin.ignore(1,'\n');
	for (int i=1; i<=K; i++) {
		cout<<"Data Set "<<i<<":\n";
		calculate();
	}
	return 0;
}