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

using namespace std;

ifstream in("sortaret.in");
ofstream out("sortaret.out");
const int NMAX = 50001;
vector<int> muchii[NMAX];
vector<int> t;
vector<int>::iterator it;
int n,m;
int g[NMAX];

void citire()
{
    in>>n>>m;
    int x,y;
    for(int i=1;i<=m;i++)
    {
        in>>x>>y;
        muchii[x].push_back(y);
        g[y]++;
    }
    in.close();
}

void solutie()
{
    t.push_back(0);
   for(int i=1;i<=n;i++)
        if(!g[i])
        t.push_back(i);
    int x;
    for(int i=1;i<=n;i++)
    {
        x = t[i];
        for(it = muchii[x].begin();it!=muchii[x].end();it++)
        {
            g[*it]--;
            if(!g[*it])
            t.push_back(*it);
        }
    }
}

void afisare()
{
    for(it = t.begin()+1;it!=t.end();it++)
    out<<*it<<" ";
}

int main()
{
    citire();
    solutie();
    afisare();
    out.close();
    return 0;
}