#include <iostream>
#include <fstream>
#include <stack>
#include <list>
using namespace std;

const int INF=1e9;

void DFS (list <int> l[],int n,bool viz[],int k,ofstream& writer,stack<int>& q)
{
    viz[k]=true;
    for(auto i:l[k])
        if(!viz[i])
            DFS(l,n,viz,i,writer,q);
    q.push(k);
}

int main()
{
    ifstream reader ("sortaret.in");
    ofstream writer ("sortaret.out");
    int n,m;
    reader>>n>>m;
    list <int> l[n];
    int x,y;
    for(int i=0;i<m;++i)
    {
        reader>>x>>y;
        x--;
        y--;
        l[x].push_back(y);
    }
    stack <int> q;
    bool viz[n];
    for(int i=0;i<n;++i)
        viz[i]=false;
    for(int i=0;i<n;++i)
        if(!viz[i])
            DFS(l,n,viz,i,writer,q);
    while(!q.empty())
    {
        writer<<q.top()+1<<" ";
        q.pop();
    }
    return 0;
}