#include <fstream>

using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,x,y,X,j,viz[5001],a[5001][5001],ord[5001],nr;

void DFS(int X)
{
    int i;
  viz[X]=1;
   for(i=1;i<=n;i++)
    if(!viz[i] and a[X][i]==1) DFS(i);
    ord[++nr]=X;
}


int main()
{
    f>>n>>m;
    for(j=1;j<=m;j++)
    {
        f>>x>>y;
    a[x][y]=1;
    }
    for(j=1;j<=n;j++)
        if(!viz[j])DFS(j);
    for(j=n;j>=1;j--)
        g<<ord[j]<<" ";
    return 0;
}