#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#define MAX 50100
using namespace std;

int n,m;
vector<int> a[MAX];
int grad[MAX],Q[MAX];
void citire()
{
    ifstream f("sortaret.in");
    f>>n>>m;
    int x,y;
    for(int i=0;i<m;i++){
        f>>x>>y;
        a[x].push_back(y);
        grad[y]++;
    }
}

int main()
{
    int i;
    citire();


    for(i=1;i<=n;i++)
        if(!grad[i])
            Q[++Q[0]]=i;

    int curent;
    for(i=1;i<=n;i++){
        curent=Q[i];
        for(vector<int>::iterator it=a[curent].begin();it!=a[curent].end();++it){
            grad[*it]--;
            if(!grad[*it])
                Q[++Q[0]]=*it;
        }
    }
    ofstream g("sortaret.out");
    for(i=1;i<=n;i++)
        g<<Q[i]<<" ";
}