#include <fstream>
#include <vector>
#include <set>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int GR[50001];
vector <int> G[50001], F;
vector <int> :: iterator ig;
set <int> L; // lista nodurilor care au gradul interior 0(nu depind de alte noduri)
set <int> :: iterator il;
int N,M;
int main()
{
    int i, x, y;
    f >> N >> M;
    for( i = 1; i <= M; i++ ){
        f >> x >> y;
        G[x].push_back(y);
        GR[y]++;
    }
    for( i = 1; i <= N; i++ )
        if(GR[i] == 0){
           L.insert(i);
        }
    /*L.erase(L.begin());
    for( il = L.begin(); il != L.end(); il++ )
        g << *(il) << " ";*/
    while(!L.empty()){
        il = L.begin();
        F.push_back(*il);
        L.erase(il);
        x = (*il);
        for(ig = G[x].begin(); ig < G[x].end(); ig++){
            GR[*(ig)]--;
            if( GR[*(ig)] == 0 )
                L.insert(*(ig));
        }
    }

    for(ig = F.begin(); ig < F.end(); ig++)
        g << *ig << " ";

    return 0;
}