#include <fstream>
using namespace std;
bool v[40000][40000],x,y;
int main()
{
	int n,m,i,j;
	ifstream f("sortaret.in");
	ofstream o("sortaret.out");
	f>>n>>m;
	for (i=1;i<=n;i++)
		v[i][0]=-1;
	while (m--)
	{
		f>>x>>y;
		v[y][x]=1;
	}
	int a=0;
	while (a!=n)
		for (i=1;i<=n;i++)
		{
			bool x=1;
			for (j=1;j<=n;j++)
				if (v[i][j]==1) {x=0;break;}
			if (x) {o<<i<<" ";a++;for (j=1;j<=n;j++) v[j][i]=0;}
		}
	return 0;
}