#include <fstream>
#include <vector>
#define NMAX 50005

using namespace std;

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

int i, n, m, x, y;
vector < int > v[NMAX];
bool visited[NMAX];

void DFS(int node)
{
    visited[node] = 1;

    for (auto it : v[node])
        if (!visited[it])
            DFS(it);
    g << node << " ";
}

int main()
{
    f >> n >> m;

    for (i = 1; i <= m; ++ i)
    {
        f >> x >> y;
        v[y].push_back(x);
    }

    for (i = 1; i <= n; ++ i)
        if (! visited[i])
            DFS(i);
    return 0;
}