#include    <fstream>
#include    <vector>
#include    <bitset>

using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

#define ARRAY_MAX 100000

int N, M, X, Y;

vector <int> Edge[ARRAY_MAX];
vector <int> Result;
bitset <ARRAY_MAX> Visited;

void DFS(int Node) {
    Visited[Node] = 1;

    for (auto Next : Edge[Node])
        if (!Visited[Next])
            DFS(Next);

    Result.push_back(Node);
}

void Read() {
    fin >> N >> M;

    for (int i = 1; i <= M; i++) {
        fin >> X >> Y;

        Edge[X].push_back(Y);
    }
}

void Solve() {
    DFS(1);

    for (int i = 1; i <= N; i++)
        if (!Visited[i])
            DFS(i);
}

void Write() {
    for (auto Node : Result)
        fout << Node << " ";
}

int main() {
    Read();
    Solve();
    Write();
}