#include <fstream>
#include <vector>
#include <queue>

using namespace std;

const int NMAX = 50000;

int N, M;
vector<int> G[NMAX + 1];
queue<int> Q;
int gr[NMAX + 1];

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

void citire()
{
    int x, y;

    f >> N >> M;

    for(int i = 1; i <= M; i++)
    {
        f >> x >> y;
        G[x].push_back(y);
        gr[y]++;
    }
}

void sortaret()
{
    for(int i = 1; i <= N; i++)
        if(gr[i] == 0)
            Q.push(i);

    while(!Q.empty())
    {
        int x = Q.front();
        Q.pop();

        g << x << ' ';

        for(const int &y : G[x])
        {
            gr[y]--;

            if(gr[y] == 0)
                Q.push(y);
        }
    }
}

int main()
{
    citire();
    sortaret();

    f.close();
    g.close();

    return 0;
}