#include <fstream>
#include <vector>

using namespace std;

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

bool viz[50005];
int sol[50005], k;
int i, x, y, n, m;
vector <int> ls[50005];

void df(int x) {
    viz[x] = 1;
    sol[++k] = x;
    int l = ls[x].size(), i;
    for (i = 0; i < l; i++)
        if (viz[ ls[x][i] ] == 0)
            df(ls[x][i]);
}

int main() {
    f >> n >> m;
    for (i = 1; i <= m; i++) {
        f >> x >> y;
        ls[x].push_back(y);
    }
    for (i = 1; i <= n; i++)
        if (!viz[i])
            df(i);

    for (i = 1; i <= n; i++)
        g << sol[i] << ' ';
    return 0;
}