#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

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

vector <int> nod[50005];
vector <int> lista;
int n, m, grad_intern[50005];

void citire()
{
    fin>>n>>m;
    int x, y;
    for(int i=1;i<=m;i++)
    {
        fin>>x>>y;
        grad_intern[y]++;
        nod[x].push_back(y);
    }
}
void rezolva()
{
    int n2=n;
    while(n2)
    {
        for(int i=1;i<=n;i++)
        {
            if(grad_intern[i]==0)
            {
                grad_intern[i]=-1;
                lista.push_back(i);
                n2--;
                for(int j=0;j<nod[i].size();j++)
                {
                    grad_intern[nod[i][j]]--;
                }
            }
        }
    }
}
void afisare()
{
    for(int i=0;i<lista.size();i++)
        fout<<lista[i]<<' ';
}
int main()
{
    citire();
    rezolva();
    afisare();
}