#include<iostream>
#include<fstream>
#include<vector>
using namespace std;

vector<int> a[50005];
int coada[50005];
int grad[50005];
int n,m;

int main()
{

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

    f>>n>>m;
    for(int i=0;i<m;i++)
    {
        int x,y;
        f>>x>>y;

        a[x].push_back(y);
        grad[y]++;
    }


    for(int i=1;i<=n;i++)

        if(grad[i]==0) coada[++coada[0]]=i;


        for(int i=1;i<=n;i++)
            {

                int x=coada[i];
                vector<int>::iterator it;

                for(it=a[x].begin();it!=a[x].end();it++)
                    {
                        grad[*it]--;
                        if(grad[*it]==0) coada[++coada[0]]=*it;


                    }

            }



    for(int i=1;i<=coada[0];i++)
        g<<coada[i]<<" ";
}