#include <fstream>
#include<vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
long long val[50001],viz[50001],i,j,maxim,m,x,y,ok,p;
vector <int> a[50001];
int n;
int main()
{
    f>>n>>m;
for(i=1;i<=m;i++)
{f>>x>>y;
a[x].push_back(y);
val[y]++;
}



ok=1;
while(ok)
{p=0;
for(i=1;i<=n;i++)
{if(val[i]==0&&viz[i]==0)
{

g<<i<<" ";
for(j=0;j<a[i].size();j++)
{
    val[a[i][j]]--;
}
 viz[i]=1;
 p++;
}



}
if(p==0)
    ok--;

}

    return 0;
}