#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
#define MAX 50100

vector<int> G[MAX];
typedef vector <int> ::iterator iter;

int viz[MAX];
void df(int nod)
{
    viz[nod] = 1;
    for(iter it = G[nod].begin() ; it != G[nod].end() ; it++)
    {
        if(!viz[*it])
            df(*it);
    }
    fout << nod << " ";
}

int main()
{
    int n, m, i, x, y;
    fin >> n >> m;
    for(i = 1 ; i <= m ; i++)
    {
        fin >> x >> y;
        //G[x].push_back(y);
        G[y].push_back(x);
    }
    for(i = 1 ; i <= n ; i++)
    {
        if(!viz[i])
            df(i);
    }
}