#include<fstream.h>
#include<vector>
#define MAX 50001

int n,m,numar[MAX],coada[MAX];
vector<int> urm[MAX];
vector<int>::iterator j;

int main()
{
  ifstream f("sortaret.in");ofstream g("sortaret.out");
  int i,x,y;
  f>>n>>m;
  for(i=1;i<=m;i++){f>>x>>y;numar[y]++;urm[x].push_back(y);}
  int p=1,u=0;
  for(i=1;i<=n;i++)
    if(numar[i]==0)coada[++u]=i;
  while(p<=u)
  {
    for(j=urm[p].begin();j!=urm[p].end();j++)
    {
      numar[*j]--;
      if(numar[*j]==0)coada[++u]=*j;
    }
    p++;
  }
  for(i=1;i<=u;i++)g<<coada[i]<<' ';
  f.close();g.close();
  return 0;
}