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

#define Nmax 50005
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector < int > v[Nmax];
vector < int > sol;
int n,m,viz[Nmax];
void pas(int x)
{
    viz[x]=1;
    vector <int > :: iterator ivector = v[x].begin();
    for(;ivector!=v[x].end();ivector++)
        if(!viz[*ivector])
            pas(*ivector);
    sol.push_back(x);
}
void sortare()
{
    for(int i=1;i<=n;i++)
        if(!viz[i])pas(i);
}
void afis()
{
    vector <int > :: iterator ivector = sol.begin();
    for(;ivector!=sol.end();ivector++)
        fout<<*ivector<<' ';
}
int main()
{
    fin>>n>>m;
    for(;m;m--)
    {
        int x,y;
        fin>>x>>y;
        v[x].push_back(y);
    }
    sortare();
    afis();
    return 0;
}