#include <fstream>
#include <vector>
#define nmax 50001

using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

int n,m;
int di[nmax],g[nmax];
vector<int>V[nmax];

void Citire()
{int i,x,y;
fin>>n>>m;
for(i=1;i<=m;i++)
   {fin>>x>>y;
    V[x].push_back(y);
    di[y]++;
   }
}

void SortareT()
{int i,p=0,j;
while(p==0)
  {p=1;
   for(i=1;i<=n;i++)
      if(di[i]==0&&g[i]!=1)
        {g[i]=1;p=0;
         fout<<i<<" ";
         for(j=0;j<V[i].size();j++)
            di[V[i][j]]--;
        }
  }
}

int main()
{
Citire();
SortareT();
    return 0;
}