#include <fstream>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
long long a[4500][45000],x,y,d[50000],n,ok,i,j,m;
int main()
{fin>>n>>m;
for(i=1;i<=m;i++)
{fin>>x>>y;
a[x][y]=1;
d[y]++;
}
while(ok==0)
    {for(i=1;i<=n;i++)
    if(d[i]==0)
     {fout<<i<<' ';
     d[i]=-1;
     for(j=1;j<=n;j++)
        if(a[i][j]==1) {a[i][j]=0;d[j]--;}
     }
     ok=1;
for(i=1;i<=n;i++)
    if(d[i]==0) ok=0;
    }
    return 0;
}