#include <iostream>
#include <stdio.h>
#include <vector>

using namespace std;

vector <int> g[50010];
vector <int>sol;

int n,m;

void citire()
{
    freopen("sortaret.in","r",stdin);
    scanf("%d %d",&n,&m);
    for(int i=0;i<m;i++)
    {
        int x,y;
        scanf("%d %d",&x,&y);
        g[x].push_back(y);
    }
}

int viz[50010];

void bfs(int k)
{
    for(int i=0;i<g[k].size();i++)
    {
        if(!viz[g[k][i]])
        {
            viz[g[k][i]]=1;
            bfs(g[k][i]);
        }
    }
    sol.push_back(k);
    return;
}

void afisare()
{
    freopen("sortaret.out","w",stdout);
    for(int i=n-1;i>=0;i--)
        printf("%d ",sol[i]);
}

int main()
{
    citire();
    bfs(1);
    afisare();
    return 0;
}