#include <bits/stdc++.h>
#define NMAX 50005
#define ALB 0
#define GRI 1
#define NEGRU 2

using namespace std;

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

int N, M;
vector < vector < int > > v;
stack < int > sol;
int color[NMAX];

void citire()
{
    int x, y;
    in >> N >> M;

    v.resize(N + 5);
    for(int i = 1 ; i <= M ; i++)
        in >> x >> y,
        v[x].push_back(y);
}

void DFS(int nod)
{
    color[nod] = GRI;

    for(int i = 0 ; i < v[nod].size() ; i++)
        if(color [ v[nod][i] ] == ALB)
            DFS(v[nod][i]);

    color[nod] = NEGRU;
    sol.push(nod);
}

void topo()
{

    for ( int i = 1 ; i <= N ; i++)
        if(color[i] == ALB)
            DFS(i);

}

void afisare()
{
    while(!sol.empty())
        out << sol.top() << ' ',
        sol.pop();

}

int main()
{
    citire();
    topo();
    afisare();
    return 0;
}