#include <bits/stdc++.h>
#include <cstring>
#include <fstream>

using namespace std;

ifstream fin ("sortaret.in");
ofstream fout ("sortaret.out");

const int  NMAX=50100;

int n,m,deg[NMAX],Q[NMAX];
vector<int> v[NMAX];

void solve(void)
{
    int i,x;
    vector<int>::iterator j;
    for(x=1;x<=n;x++)
     if(deg[x]==0)
        Q[++Q[0]]=x;
    for(i=1;i<=n;i++)
    {
        x=Q[i];
        for(j=v[x].begin();j!=v[x].end();j++)
        {
            deg[*j]--;
            if(deg[*j] == 0)
                Q[++Q[0]]=*j;
        }
    }
}

void read_data(void)
{
    int i, a, b;
    fin>>n>>m;
    for(i=1;i<=m;i++)
    {
        fin>>a>>b;
        v[a].push_back(b);
        deg[b]++;
    }
}

void write_data(void)
{
    int i;
    for(i=1;i<=n;i++)
        fout<<Q[i]<<" ";
}

int main(void)
{

   read_data();
    solve();
    write_data();
    return 0;
}