#include <fstream>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
struct nod
{
    int info,cod;
    nod *next;
};
nod *p,*l[50001],*t;
int x,y,i,j,n,nods,viz[50001],w,L[50001],niv,z,ga,ok,m,s[50001],k,pr;
int main()
{
    fin>>n>>m;
    for(i=1;i<=m;++i)
    {
        fin>>x>>y;
        p=new nod;
        p->info=y;
        p->cod=0;
        p->next=l[x];
        l[x]=p;
        viz[y]=1;
    }
    for(i=1;i<=n;++i)
        if(viz[i]==0)
            s[++k]=i;
    for(i=1;i<=n;++i)
        viz[i]=0;
    i=1;
    pr=1;
    while(pr<=k)
    {
        x=s[pr++];
        viz[x]=1;
        L[++w]=x;
        p=new nod;
        p=l[x];
        while(p)
        {
            if(viz[p->info]==0&&p->cod==0)
            {
                s[++k]=p->info;
                viz[p->info]=1;
                p->cod=1;
            }
            p=p->next;
        }

    }
    for(i=1;i<=n;++i)
        fout<<L[i]<<" ";
    return 0;
}