#include <bits/stdc++.h>

using namespace std;

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

const int DIM = 50007;

vector <int> rez;
vector <int> l[DIM];

bool viz[DIM];


void dfs(int x)
{
    viz[x] = true;

    for(int i = 0; i < l[x].size(); i++)
    {
        int vec = l[x][i];
        if(viz[vec] == false)
            dfs(vec);
    }
    rez.push_back(x);
}

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

    for(int i = 1; i <= m; i++)
    {
        int x, y;
        in >> x >> y;

        l[x].push_back(y);
    }

    for(int i = 1; i <= n; i++)
        if(viz[i] == false)
            dfs(i);

    for(int i = rez.size() - 1; i >= 0; i--)
        out << rez[i] <<" ";
    return 0;
}