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

ifstream cin("sortaret.in");
ofstream cout("sortaret.out");

int n, m, nrp[50001], coada[50001], inc, sf;

vector <int> a[50001];

void citire(){
    int x, y;
    cin>>n>>m;
    for(int i=1; i<=m; i++){
        cin>>x>>y;
        a[x].push_back(y);
        nrp[y]++;
    }
    for(int i=1; i<=n; i++)
        if(nrp[i]==0)
            coada[++sf]=i;
}

void sortop(int nod){
    int x, y;
    inc=sf=1;
    coada[1]=nod;
    while(inc<=sf){
        x=coada[inc++];
        cout<<x<<' ';
        for(int i=0; i<a[x].size(); i++){
            y=a[x][i];
            nrp[y]--;
            if(!nrp[y])
                coada[++sf]=y;
        }
    }
}

int main(){
    citire();
    sortop(1);
    return 0;
}