#include <fstream>
#include <vector>

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

int n,m,i,x,y,deg[50005],sol[50005];
vector <int> v[50005];
int main()
{
    fin>>n>>m;
    for (i=1; i<=m; i++)
    {
        fin>>x>>y;
        v[x].push_back(y);
        deg[y]++;
    }

    for (i=1; i<=n; i++)
        if (deg[i]==0)
        sol[++sol[0]]=i;

    for (i=1; i<=n; i++)
    {
        x=sol[i];
        for (y=0; y<v[x].size(); y++)
        {
            deg[v[x][y]]--;
            if (deg[v[x][y]]==0)
                sol[++sol[0]]=v[x][y];
        }
    }

    for (i=1; i<=n; i++)
        fout<<sol[i]<<" ";

    return 0;
}