#include <vector>
#include <fstream>

#define NMAX 50010
using std::vector;

std::ifstream fin("sortaret.in");
std::ofstream fout("sortaret.out");

int n, m;
vector<int> ad[NMAX];

int top;
int st[NMAX];
bool vis[NMAX];

void dfs(int node) {
    vis[node] = true;
    for (int i = 0; i < (int) ad[node].size(); i++)
        if (!vis[ad[node][i]])
            dfs(ad[node][i]);
    st[++top] = node;
}

int main() {
    int x, y;

    fin >> n >> m;
    for (int i = 0; i < m; i++) {
        fin >> x >> y;
        ad[x].push_back(y);
    }

    for (int i = 1; i <= n; i++)
        if (!vis[i])
            dfs(i);

    for (int i = top; i >= 1; i--)
        fout << st[i] << ' ';
    fout << '\n';

    fout.close();
    return 0;
}