#include <iostream>
#include <fstream>
#include <queue>
#define NMAX 50005
std::ifstream in("sortaret.in");
std::ofstream out("sortaret.out");

using namespace std;
vector<int> v[NMAX];

bool viz[NMAX];
int a,b;
void dfs(int x)
{
    out<<x<<" ";
    viz[x]=1;
    for(int i=0;i<v[x].size();i++)
    {
        if(!viz[v[x][i]])
         {
             dfs(v[x][i]);
         }
    }
}

int main()
{
    in>>a>>b;
    for(int i=1;i<=b;i++)
    {
        int x,y;
        in>>x>>y;
        v[x].push_back(y);
    }
    for(int i=1;i<=a;i++)
    {
        if(viz[i]==0)
        {
            dfs(i);
        }
    }
    return 0;
}