#include <fstream>
#include <vector>
#define MX 50001
using namespace std;

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

int n,m,t;
vector<int> v[MX];
int gi[MX],viz[MX];
int a[MX];

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

    for(i=1; i<=n; i++)
    {
        if(gi[i] == 0) v[0].push_back(i);
    }
}

void DFS(int i)
{
    vector<int>::iterator it;
    viz[i] = 1;
    for(it=v[i].begin(); it!=v[i].end(); it++)
    {
        if(viz[*it] == 0) DFS(*it);
    }
    t++;
    a[t] = i;
}

void tipar()
{
    int i;
    for(i=t-1; i>0; i--) fout<<a[i]<<' ';
}

int main()
{
    citire();
    DFS(0);
    tipar();

    fin.close(); fout.close();
    return 0;
}