#include<fstream>
#include<vector>
#include<list>

#define dmax 50003

using namespace std;

ifstream in("sortaret.in");
ofstream out("sortaret.out");

int n, m, color[dmax];
vector<int>v[dmax];
list<int> ls;
list<int>::iterator ir;


void dfs(int x)
{
	vector<int>::iterator it;

	color[x] = 1;

	for(it = v[x].begin(); it < v[x].end(); it++)
		if(color[*it] == 0)
		{
			dfs(*it);
		}
	color[x] = 2;
	ls.push_front(x);	
}	



int main()
{
	in>>n>>m;
	
	for(int i=1; i<=m; i++)
	{
		int v1, v2;	
		
		in>>v1>>v2;
		
		v[v1].push_back(v2);
	}
	in.close();
	
	for(int i=1; i<=n; i++)
		if(color[i] == 0)
		{
			dfs(i);
		}	
		
	for(ir = ls.begin(); ir != ls.end(); ir++)
		out<<*ir<<" ";	

	out.close();
	return 0;
}