#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

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

vector <int> v[50001];
vector <int> afis;
bool viz[50001];
int n, m, xx, yy;

void readit()
{
    in>>n>>m;
    while(m--) in>>yy>>xx, v[yy].push_back(xx);
}

void DFS(int nod)
{
    viz[nod]=1;
    for(int i=0; i<v[nod].size(); i++)
        DFS(v[nod][i]);
    afis.push_back(nod);
}

int main()
{
    readit();
    for(int i=1; i<=n; i++)
        if(!viz[i]) DFS(i);
    for(int i=afis.size()-1; i>=0; i--) out<<afis[i]<<' ';
    return 0;
}