#include <fstream>
#include <vector>

using namespace std;

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

const int Max = 50010;

vector<int> v[Max];
int grad[Max], q[Max];

int main()
{
    int n, m, x, y, nr = 0;
    in >> n >> m;
    for(int i = 1; i <= m; ++i)
    {
        in >> x >> y;
        v[x].push_back(y);
        grad[y]++;
    }

    for(int i = 1; i <= n; ++i)
        if(grad[i] == 0)
            q[++nr] = i;

    for(int i = 1; i <= n; ++i)
        for(vector<int>::iterator it = v[q[i]].begin(); it != v[q[i]].end(); ++it)
            if(--grad[*it] == 0)
                q[++nr] = *it;

    for(int i = 1; i <= nr; ++i)
        out << q[i] << " ";

    return 0;
}