#include <bits/stdc++.h>

using namespace std;

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

int n, m, viz[50005];
vector < int > L[50005];

void Citire()
{
    int i, x, y;
    fin >> n >> m;
    for(i = 1; i <= m; i++)
    {
        fin >> x >> y;
        L[y].push_back(x);
    }
}

void DFS(int k)
{
    viz[k] = 1;
    for(auto w : L[k])
        if(viz[w] == 0)
            DFS(w);
    fout << k << " ";
}

int main()
{
    int i;
    Citire();
    for(i = 1; i <= n; i++)
        if(viz[i] == 0)
            DFS(i);
    return 0;
}