#include <iostream>
#include <fstream>
#include <vector>
#define NM 50001

using namespace std;

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

vector<int> G[NM];
int di[NM], c[NM];
int n,m;

int main()
{
    int i,j,u,p,w,z,x,y;
    fin>>n>>m;
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        G[x].push_back(y);
        di[y]++;
    }
    u=0;
    for(i=1;i<=n;i++)
    {
        if(di[i]==0)
            c[++u]=i;
    }
    p=1;
    while(p<=u)
    {
        z=c[p++];
        fout<<z<<" ";
        for(i=0;i<G[z].size();i++)
        {
            w=G[z][i];
            di[w]--;
            if(di[w]==0)
            {
                u++;
                c[u]=w;
            }
        }
    }
}