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

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
typedef long long ll;

const int NMAX = 5e4 + 5;
vector<int> graf[NMAX];
bitset<NMAX> viz;
vector<int> postord;

void DFS(int nod)
{
	viz[nod] = 1;
	for (unsigned int i = 0; i < graf[nod].size(); ++i)
		if (!viz[graf[nod][i]]) DFS(graf[nod][i]);
	postord.push_back(nod);
}
int main()
{
	ios_base::sync_with_stdio(false);
	fin.tie(0);

	int n, m;
	fin >> n >> m;
	
	for (int i = 1; i <= m; ++i)
	{
		int x, y;
		fin >> x >> y;
		graf[x].push_back(y);
	}
	
	for (int i = 1; i <= n; ++i) if (!viz[i]) DFS(i);
	for (size_t i = postord.size(); i > 0; --i) fout << postord[i - 1] << " ";
	
	return 0;
}