#include<fstream>
#include<vector>
using namespace std;

vector <int> v[50005];
int n,m,q[50005],deg[50005];

void citire() {

    ifstream in("sortaret.in");
    int i,x,y;
    in>>n>>m;
    for(i=1;i<=m;i++) {
        in>>x>>y;
        v[x].push_back(y);
        deg[y]++;
    }
}

void solve() {

    int i,x;
    vector<int> :: iterator it;

    for(x = 1; x <= n; x++)
        if(deg[x] == 0)
            q[++q[0]] = x;

    for(i = 1; i <= n; i++) {
        x = q[i];
        for(it = v[x].begin(); it != v[x].end(); ++it){
            deg[*it]--;
            if(deg[*it] == 0)
                q[++q[0]] = *it;
            }
    }
}

void afisare () {

    ofstream out ("sortaret.out");
    int i;

    for(i=1;i<=n;i++)
        out<<q[i]<<" ";
    out<<'\n';

    out.close();

}

int main (){

    citire();
    solve();
    afisare();

    return 0;
}