#include <fstream>
#include <vector>
#include <stack>
#define NMAX 50005
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
vector<int>G[NMAX],viz;
stack<int>st;
void dfs(int u)
{
    int v,j;
    viz[u]=1;
    for(j=0;j<G[u].size();++j)
    {
        v=G[u][j];
        if(viz[v]==0)
            dfs(v);
    }
    st.push(u);
}
int main()
{
    int u,v,i,j,m,n;
    while(cin>>n>>m)
    {
        viz.assign(n+1,0);
        for(i=1;i<=m;++i)
        {
            cin>>u>>v;
            G[u].push_back(v);
        }
        for(i=1;i<=n;++i)
            if(viz[i]==0)
                dfs(i);
        while(!st.empty())
        {
            cout<<st.top()<<" ";
            st.pop();
        }
    }
    return 0;
}