#include <iostream>
#include <vector>
#include <fstream>
using namespace std;
vector <int> g[50002];
int viz[50002],n,m;
ifstream f ("sortaret.in");
ofstream out ("sortaret.out");

void citire()
{
    f>>n>>m;
    int i,x,y;
    for (i=1;i<=m;++i)
    {
        f>>x>>y;
     g[x].push_back(y);
     }

}
void dfs(int x)
{int i;
    viz[x]=1;
    out<<x<<" ";
    for(i=0;i<g[x].size();++i)
            if (viz[g[x][i]]==0) dfs(g[x][i]);
        }
int main()
{int i,nr=0;
    citire();
        for(i=1;i<=n;++i)

        if (viz[i]==0)
                        dfs(i);
    return 0;
}