#include <fstream>
#define nmax 50001
#include <vector>
#include <algorithm>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int gint[nmax],n,m,c[nmax],viz[nmax],ct;
vector<int>V[nmax];
void Citire()
{ fin>>n>>m;
int i,x,y;
for(i=1;i<=m;i++)
{ fin>>x>>y;
   V[x].push_back(y);
    gint[y]++;
}

}
void sortaret()
{ int i;
  vector<int>::iterator it;
  while(ct!=n)
  {
    for(i=1;i<=n;i++)
    if(gint[i]==0 && viz[i]==0)
     c[++ct]=i;

    for(i=1;i<=ct;i++)
        if(viz[c[i]]==0)
    { viz[c[i]]=1;
     for(it=V[c[i]].begin();it!=V[c[i]].end();++it)
         gint[*it]--;
    }

  }

}
int main()
{
    Citire();
    sortaret();
    int i;
    for(i=1;i<=ct;i++)
        fout<<c[i]<<" ";
    return 0;
}