#include <bits/stdc++.h>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
const int MAXN =50100;
int N, M, viz[MAXN], deg[MAXN];
 vector<int> G[MAXN];

void sol()
{
    int i, j, k;

    for(i = 1; i <= N; i++)
    {
        for(j = 1; j <= N; j++)
         if(!viz[j] && deg[j] == 0)
         {
            viz[j] = 1;
            g<<j<<" ";
            for(k = 0; k < G[j].size(); k++)
                deg[ G[j][k] ]--;
            break ;
         }
    }
}

void citire()
{
    int i, a, b;
    f>>N>>M;
    for(i = 1; i <= M; i++)
        { f>>a>>b;
            G[a].push_back(b);
            deg[b]++;
        }
}

int main()
{
citire();
sol();

    return 0;
}