#include <fstream>
#include <vector>
using namespace std;
ifstream cin ("sortaret.in");
ofstream cout ("sortaret.out");
int grad[50005];
int sol[50005];
vector <int> lista[50005];
int main()
{
    int n, m, x, y, i, nrsol = 0, j;
    cin >> n >> m;
    for (i = 1; i <= m; i++)
    {
        cin >> x >> y;
        grad[y]++;
        lista[x].push_back(y);
    }
    for (i = 1; i <= n; i++)
        if (grad[i] == 0)
            sol[++nrsol] = i;
    i = 1;
    while (nrsol < n)
    {
        for (j = 0; j < lista[sol[i]].size(); j++)
        {
            grad[lista[sol[i]][j]]--;
            if (grad[lista[sol[i]][j]] == 0)
                sol[++nrsol] = lista[sol[i]][j];
        }
        i++;
    }
    for (i = 1; i <= nrsol; i++)
        cout << sol[i] << " ";
    return 0;
}