#include <fstream>
#include <vector>

using namespace std;

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

void dfs(vector<vector<int>> &g, vector<char> &vis, vector<int> &ans, int x)
{
    ans.push_back(x);
    vis[x] = 1;

    for(int i : g[x])
    {
        if(!vis[i])
        {
            dfs(g, vis, ans, i);
        }
    }
}

int main()
{
    int n, m;
    be >> n >> m;

    vector<vector<int>> g(n + 1);

    for(int i = 0; i < m; i++)
    {
        int x, y;
        be >> x >> y;

        g[x].push_back(y);
    }

    vector<int> ans;
    vector<char> vis(n + 1);

    for(int i = 1; i <= n; i++)
    {
        if(!vis[i])
        {
            dfs(g, vis, ans, i);
        }
    }


    for(int i : ans)
    {
        ki << i << " ";
    }

    return 0;
}