#include <iostream>
#include <cstdio>
#include <vector>
#include <bitset>
#define nmax 50010
using namespace std;

int n,m1,val[nmax];
vector<int> m[nmax],sol;
bitset <nmax> viz;

void solve(int nod)
{
    viz[nod]=1;
    cout<<nod<<' ';
    for(vector<int>::iterator it=m[nod].begin();it!=m[nod].end();it++)
        solve(*it);
}

int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    cin>>n>>m1;
    int n1,n2;
    for(;m1;m1--)
    {
        cin>>n1>>n2;
        m[n1].push_back(n2);
        val[n1]++;
    }
    int i;
    for(i=1;i<=n;i++) if(!viz[i]) solve(i);
    for(i=0;i<sol.size();i++) cout<<sol[i]<<' ';
    fclose(stdin);
    fclose(stdout);
    return 0;
}