#include <stdio.h>
#include <vector>

using namespace std;

int n, m, l[50000];
bool viz[50000];
vector<int> g[50000];

void citire()
{
    FILE* f = fopen("sortaret.in", "r");

    fscanf(f, "%d%d", &n, &m);

    for (int i = 0; i < m; ++i)
    {
        int x, y;
        fscanf(f, "%d%d", &x, &y);
        g[x].push_back(y);
    }

    fclose(f); 
}

void dfs(int nod, int niv)
{
    if (l[nod] < niv)
        l[nod] = niv;
    printf("%d ", nod);
    viz[nod] = true;
    for (int i = 0; i < g[nod].size(); ++i)
    {
        dfs(g[nod][i], niv + 1);
    }
}

void afisare()
{
    FILE* f = fopen("sortaret.out", "w");

    for (int i = 1; i <= n; ++i)
        for (int j = 1; j <= n; ++j)
            if (l[j] == i)
                fprintf(f, "%d ", j);

    fclose(f);
}

int main()
{
    citire();

    for (int i = 1; i <= n; ++i)
        dfs(i, 1);

    afisare();

    return 0;
}