#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
#include <queue>

using namespace std;

#define mp make_pair
#define pb push_back
#define sz(c) (int)((c).size())
#define f first
#define s second

#define fin  "sortaret.in"
#define fout "sortaret.out"

#define NMAX 50010

int N, M;
vector<int> g[NMAX];
char viz[NMAX];

void ReadData()
{
	int a, b;

	ifstream f(fin);

	f >> N >> M;
	for ( int i = 1; i <= M; ++i )
		f >> a >> b, g[a].pb(b);
	f.close();
}

void df(int x, ofstream &f)
{
	f << x << " ";

	viz[x] = 1;
	for ( int i = 0; i < sz(g[x]); ++i )
		if ( !viz[ g[x][i] ] )
			df( g[x][i], f );

}

void Solve()
{
	ofstream f(fout);

	memset(viz,0,sizeof(viz));
	for ( int i = 1; i <= N; ++i )
		if ( !viz[i] ) df(i,f);
	
	f.close();
}

int main()
{
	ReadData();
	Solve();
	return 0;
}