/* 
 * File:   main.cpp
 * Author: VirtualDemon
 *
 * Created on April 3, 2010, 11:11 AM
 */
#include <vector>
#include <cstdlib>
#include <fstream>
#include <iterator>

/*
 * 
 */
using namespace std;
vector< int > ST, d;
vector< vector< int > > G;
vector< int >::const_iterator it, iend;
int main( void )
{
    unsigned int N, M, i, j;
    ifstream in( "sortaret.in" );
    in>>N>>M;
    G.resize(N);
    d.resize(N);
    for( ; M; --M )
    {
        in>>i>>j;
        --i, --j;
        G[i].push_back(j);
        ++d[j];
    }
    for( i=0; i < N; ++i )
        if( !d[i] )
            ST.push_back(i+1);
    for( i=0; i < N; ++i )
    {
        j=ST[i]-1;
        for( it=G[j].begin(), iend=G[j].end(); it < iend; ++it )
        {
            --d[*it];
            if( !d[*it] )
                ST.push_back(*it+1);
        }
        if( N == ST.size() )
            break;
    }
    ofstream out( "sortaret.out" );
    copy( ST.begin(), ST.end(), ostream_iterator<int>( out, " " ) );
    out<<'\n';
    return EXIT_SUCCESS;
}