#include <fstream>
#include <vector>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector <int> v[50001];
int tati[50001];
void elim(int x)
{
    while(!v[x].empty())
    {
        tati[v[x][0]]--;
        v[x].erase(v[x].begin());
    }
}
int main()
{
    int n,m,i,x,y;
    fin>>n>>m;
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        v[x].push_back(y);
        tati[y]++;
    }
    int sel=0;
    while(sel<n)
    {
        for(i=1;i<=n;i++)
            if(tati[i]==0)
            {
                elim(i);
                tati[i]=-1;
                fout<<i<<' ';
                sel++;
            }
    }
    return 0;
}