#include <vector>
#include <cstdlib>
#include <fstream>
#include <iterator>
#include <algorithm>

using namespace std;

const int NMAX = 50011;

bool was[NMAX];
vector<int> ans;
vector<int> G[NMAX];

inline void DFS(int x)
{
	was[x] = true;
	vector<int>::iterator it = G[x].begin(), iend = G[x].end();
	
	for(; it < iend; ++it)
	{
		if(!was[*it])
			DFS(*it);
	}
	ans.push_back(x);
}

int main()
{
	int N, M, x, y;
	ifstream in("sortaret.in");
	ofstream out("sortaret.out");
	
	for(in >> N >> M; M; --M)
	{
		in >> x >> y;
		G[x].push_back(y);
	}
	
	for(x = 1; x <= N; ++x)
	{
		if(!was[x]) DFS(x);
	}
	copy(ans.rbegin(), ans.rend(), ostream_iterator<int>(out, " "));
	out << '\n';
	
	return EXIT_SUCCESS;
}