#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <vector>
#include <bitset>
#define NMAX 50005

using namespace std;

int n, m;
vector<int> v[NMAX], sol;
bitset<NMAX> viz;

void readData(){
   int x, y;
   scanf("%d %d\n", &n, &m);
   for (int i = 1; i <= m; ++i){
      scanf("%d %d\n", &x, &y);
      v[x].push_back(y);
   }
}

void dfs(int x){
   for (vector<int>::iterator it = v[x].begin(); it != v[x].end(); ++it){
      if (!viz[*it]){
         viz[*it] = 1;
         dfs(*it);
      }
   }
   sol.push_back(x);
}

void printData(){
   for (int i = sol.size()-1; i >= 0; --i)
       printf("%d ", sol[i]);
}

int main()
{
   freopen("sortaret.in", "r", stdin);
   freopen("sortaret.out", "w", stdout);
   readData();
   for (int i = 1; i <= n; ++i){
      if (!viz[i]){
         viz[i] = 1;
         dfs(i);
      }
   }
   printData();

   return 0;
}