#include<bits/stdc++.h>
using namespace std;
vector<int>graph[1001];
int visit[1001];
int n, e;
stack<int>ans;
void dfs(int start)
{
    visit[start] = 1;
    for(int j = 0; j < graph[start].size();j++)
    {
        int node = graph[start][j];
        if(visit[node] == 0)
        {
            visit[node] = 1;
            dfs(node);
        }
    }
    ans.push(start);
}
 
int main()
{
    cin>>n>>e;
    int u, v;
    for(int i = 1; i <= e; i++)
    {
        cin>>u>>v;
        graph[u].push_back(v);
    }
    for(int i = 1; i <= n; i++)
    {
        if(visit[i] == 0)
        {
            dfs(i);
        }
    }
 
    while(!ans.empty())
    {
        cout<<ans.top()<<" ";
        ans.pop();
    }
 
}
 

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