#include <fstream>

using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");

int x,y,a[5001][5001],viz[5001],i,n,m;

void dfs(int x)
{
    int i;
    g<<x<<" ";
  viz[x]=1;
   for(i=1;i<=n;i++)
    if(!viz[i] and a[x][i]==1) dfs(i);

}

int main()
{
    f>>n>>m;
     while(m)
     {
         f>>x>>y;
        a[x][y]=1;
    m--;
     }
     for(i=1;i<=n;i++)
        if(!viz[i]) dfs(i);
    return 0;
}