#include <bits/stdc++.h>
using namespace std;

int main() {
	int n, m; cin >> n >> m;
	vector<vector<int>>adj(n+1);
	while(m--)
	{
		int a, b; cin >> a >> b;
		adj[a].push_back(b);
	}
	int maxi = 0, index = -1;
	for(int i = 1; i <= n; i++)
	{
		int sum = 0;
		for(int j = 0; j < adj[i].size(); j++)sum += adj[adj[i][j]].size();
		if(sum > maxi)
		{
			maxi = sum;
			index = i;
		}
	}
	if(index == -1)
	{
		cout << -1;
		return 0;
	}
	cout << index << " " << maxi;
}