#include<fstream>
#include<vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,i,x,y,nr,v[50009],viz[50009];
vector<int>l[50009];
void dfs(int x)
{
    viz[x]=1;
    for(vector<int>::iterator it=l[x].begin();it!=l[x].end();++it)
    if(!viz[*it])
    dfs(*it);
    ++nr;
    v[nr]=x;
}
int main()
{
    f>>n>>m;
    for(i=1;i<=m;++i)
    {
        f>>x>>y;
        l[x].push_back(y);
  //      l[y].push_back(x);
    }
    for(i=1;i<=n;++i)
    if(viz[i]==0)
    dfs(i);
    for(i=n;i;--i)
    g<<v[i]<<' ';
    g<<'\n';
    return 0;
}