#include <fstream>
#include <iostream>
#include <sstream>
#include <string>

using namespace std;

int main(void)
{
	int K, s, t;
	int stemp, ttemp;
	int money[50];
	bool found;
	fstream in;
	in.open("money.in");

	in>>K;

	for(int k=0; k<K; k++)
	{
		for(int i=0; i<50; i++)
		{
			money[i]=0;
		}
		found = false;

		in>>s>>t;

		for(int i=0; i<t; i++)
		{
			in>>stemp>>ttemp;
			money[stemp-1] += ttemp;
		}

		int max=0, second=0;
		int maxplace;

		for(int i=0; i<s; i++)
		{
			if(money[i] > 2*max)
			{
				max = money[i];
				maxplace = i+1;
			}
			else if(money[i] > second)
			{
				second = money[i];
			}
		}
		cout<<"Data Set "<<k+1<<":"<<endl;
		if(max > 2*second)
		{
			cout<<maxplace<<endl<<endl;
		}
		else
		{
			cout<<"No suspect."<<endl<<endl;
		}
	}

	in.close();
}