#include<fstream>
using namespace std;

int A[1010][1010];
bool S[1010];

int main()
{
    int n,m,i,j;
    ifstream f("sortaret.in");
    ofstream g("sortaret.out");
   f>>n>>m;
    for(i=1;i<=m;++i)
    {
        int x,y;
        f>>x>>y;
        A[x][y]=1;
        A[0][y]++;
        A[x][0]++;
    }
    int noduri_neselectate=n;

    while(noduri_neselectate)
    {
        i=1;
        while(i<=n)
        {
            if(A[0][i]==0 && !S[i])
            {
                g<<i<<" ";
                noduri_neselectate--;
                S[i]=true;
                for(j=1;j<=n;++j)
                {
                    if(A[i][j])
                      {
                          A[i][j]=0;
                          A[0][j]--;
                          A[i][0]--;
                      }
                }
               // i=0;
            }
            i++;
        }
    }
    f.close();
    g.close();
    return 0;
}