#include <bits/stdc++.h>
#define lim 50000

using namespace std;
ifstream in("sortaret.in");
ofstream out("sortaret.out");

vector<int> v[lim+5];
vector<int> sol;
bitset<lim+5> gr, viz;
int n, m;

void dfs(int nod)
{
    viz[nod]=1;
    sol.push_back(nod);
    for(int i : v[nod]) if(viz[i]==0)
        dfs(i);
}

int main()
{
    in>>n>>m;
    for(int i=1; i<=m; i++)
    {
        int x, y;
        in>>x>>y;
        v[x].push_back(y);
        gr[y]=1;
    }

    for(int i=1; i<=n; i++) if(gr[i]==0) dfs(i);

    for(int i : sol) out<<i<<' ';
    return 0;
}