#include <fstream>
#include <vector>

using namespace std;

const int MAX = 50050;

vector<int> v[MAX];
int grad[MAX], q[MAX], n, m;

void citire()
{
    ifstream in("sortaret.in");
    int x, y;
    in>>n>>m;
    for(int i = 1; i <= m; i++)
    {
        in>>x>>y; v[x].push_back(y); grad[y]++;
    }
    in.close();
}

void solve()
{
    int x;
    for(int i = 1; i <= n; i++)
        if(!grad[i])
            q[++q[0]] = i;
    for(int i = 1; i <= n; i++)
    {
        x = q[i];
        for(size_t j = 0; j < v[x].size(); j++)
        {
            grad[v[x][j]]--;
            if(!grad[v[x][j]])
                q[++q[0]] = v[x][j];
        }
    }
}

void afisare()
{
    ofstream out("sortaret.out");
    for(int i = 1; i <= n; i++)
        out<<q[i]<<" ";
    out.close();
}

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