#include <fstream>
#include <vector>
#include <bitset>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");

int N ,M, x, y;
vector <int> G[50005], sol;
bitset <50005> viz;

void dfs(int nod)
{
    viz[nod]=1;
    vector <int>::iterator it=G[nod].begin();
    for (; it!=G[nod].begin(); ++it)
        if (!viz[*it]) dfs(*it);
    sol.push_back(nod);
}

int main()
{
    f>>N>>M;
    for (int i=1; i<=M; ++i)
        f>>x>>y, G[x].push_back(y);
    for (int i=1; i<=N; ++i)
        if (!viz[i]) dfs(i);
    for (int i=sol.size()-1;  i!=0; --i)
        g<<sol[i]<<' ';
    return 0;
}