#include <iostream>
#include <vector>
#include <fstream>



using namespace std;

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

vector <vector <int> > gr;
#define NMAX 50005
int n,m;
int v[NMAX];


void citire()
{
    int x;
    int y;
    gr.resize(n+1);
    for(int i=0;i<m;i++)
    {
        f>>x>>y;
        gr[y].push_back(x);

    }
    cout<<"22";
}
void dfs(int x)
{
    v[x]=1;
    for(int i=0;i<gr[x].size();i++)
    {
        if(v[gr[x][i]]==0)
            dfs(v[gr[x][i]]);
    }
    g<<x<<" ";



}

int main()
{
    f>>n>>m;
    citire();
    for(int i=1;i<=n;i++)
    {
        if(v[i]==0)
        {
            dfs(i);
        }
    }

    return 0;
}