#include <iostream>
#include<vector>
#include<fstream>
#include<queue>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
 
const int MAXN=50001;
vector <int> Graf[MAXN];
queue <int> Q;
int In[MAXN],Out[MAXN];
using namespace std;
 int n,m;
int main()
{
 fin>>n>>m;
 for(int i=0;i<=m;i++)
 {
    int x,y;
    fin>>x>>y;
    Graf[x].push_back(y);
   // In[y]++;
    Out[y]++;
 }
 for(int i=1;i<=n;i++)
 {
    if(Out[i]==0)
    {
        Q.push(i);
        fout<<i<<" ";
    }
 }
 
 while(!Q.empty())
 {
    int nod=Q.front();
    Q.pop();
    for(int i=0;i<Graf[nod].size();i++)
    {
        int act_nod=Graf[nod][i];
       Out[act_nod]--;
       if(Out[act_nod]==0)
       {
        Q.push(act_nod);
        fout<<act_nod<<" ";
        }
    }
 
 }
 
}