#include<fstream>
#include<list>
#define DMAX 50002
using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
list<int> l[DMAX];
list<int>::iterator it;
int a,b,i,n,m,nod,gint[DMAX],c[DMAX];

int main()
{
    fin>>n>>m;
    for(i=1;i<=m;++i)
        fin>>a>>b, l[a].push_back(b), ++gint[b];
    for(i=1;i<=n;++i)
        if(!gint[i])
            c[++c[0]]=i;
    for(i=1;i<=n;++i)
    {
        nod=c[i];
        for(it=l[nod].begin();it!=l[nod].end();++it)
        {
            --gint[*it];
            if(!gint[*it])
                c[++c[0]]=*it;
        }
    }
    for(i=1;i<=n;++i)
        fout<<c[i]<<" ";
    return 0;
}