#include <fstream>
#include <vector>
#define NMAX 50010

using namespace std;

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

int n, m, di[NMAX], ic, sc, C[NMAX];
vector<int> A[NMAX];
bool viz[NMAX];

int main()
{
    int i, k, a, b;
    fin >> n >> m;
    for (i = 1; i <= m; i++)
    {
        fin >> a >> b;
        di[b]++;
        A[a].push_back(b);
    }
    sc = -1;
    for (i = 1; i <= n; i++)
    {
        if (!di[i])
            C[++sc] = i;
    }
    while (ic <= sc)
    {
        i = C[ic++];
        fout << i << ' ';
        for (k = 0; k < A[i].size(); k++)
        {
            di[A[i][k]]--;
            if (!di[A[i][k]] && !viz[A[i][k]])
                C[++sc] = A[i][k];
        }
    }
    fout << '\n';
    fout.close();
    return 0;
}