#include <iostream>
#include <fstream>
#include <vector>
#define VVI vector<vector<int> >
using namespace std;

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

VVI G;
int n, m;
void Citire();
void SortareT(int nod);
bool vizitat[50005];
int rez[50005];
int k = 0;

int main()
{
    Citire();
    for (int i = 1; i <= n; ++i)
    {
        if (!vizitat[i])
            SortareT(i);
    }

    for (int i = 1; i <= k; ++i)
        fout << rez[i] << ' ';
}

void SortareT(int nod)
{
    vizitat[nod] = true;
    for (int i = 0; i < G[nod].size(); ++i)
    {
        int nou = G[nod][i];
        if (!vizitat[nou])
            SortareT(nou);
    }

    rez[++k] = nod;
}

void Citire()
{
    int x, y;
    fin >> n >> m;
    G = VVI(n + 1);
    for (int i = 1; i <= m; ++i)
    {
        fin >> x >> y;
        G[x].push_back(y);
    }
}