#include <fstream>
#include <vector>
#define NMAX 50005

using namespace std;

const char inname[] = "sortaret.in";
const char outname[] = "sortaret.out";
ifstream fin(inname);
ofstream fout(outname);

struct liste{
    vector<int> vecini;
    int gradint;
};
liste L[NMAX];
int n, m, nrsel, viz[NMAX];

void citire();
void stopo();

int main(){
    citire();
    stopo();
    fin.close();
    fout.close();
    return 0;
}

void citire(){
    int i, x, y;
    fin >> n >> m;
    for(i=1; i<=m; i++){
        fin >> x >> y;
        L[x].vecini.push_back(y);
        L[y].gradint++;
        }
}

void stopo(){
    int i, j;
    while(nrsel < n){
        for(i=1; i<=n; i++)
            if(L[i].gradint == 0 && viz[i] == 0){
                nrsel++;
                viz[i] = 1;
                fout << i << ' ';
                for(j=0; j<L[i].vecini.size(); j++)
                    L[L[i].vecini[j]].gradint--;
                }
        }
}