#include <fstream>
#include <vector>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int sol[50010],n,m,x,y,v[50010],k;
vector<int> L[100010];
void dfs(int nod) {
	v[nod]=1;
	sol[k++]=nod;
	for (int i=0;i<L[nod].size();i++) {
		int vecin=L[nod][i];
		if (v[vecin]==0)
			dfs(vecin);
	}
}
int main() {
	fin>>n>>m;
	while (m--) {
		fin>>x>>y;
		L[x].push_back(y);
	}
	for (int i=1;i<=n;i++) {
		if (v[i]==0)
			dfs(i);
	}
	for (int i=0;i<k;i++)
		fout<<sol[i]<<" ";
	return 0;
}