program topsort;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var
  n, m, i, j, a, b, pos, gl: integer;
  otv: boolean;
  ad, list, head, next, mark, prev: array [0..1000] of integer;
  ar : array[0..1000,0..1000]of integer;

procedure dfs(v: integer);
  var
    i, u: integer;
  begin
    mark[v] := 1;
    i := head[v];
    while(i <> 0)do begin
      u := list[i];
      if(mark[u] = 0)then dfs(u);
      i := next[i];
    end;
    inc(gl);
    ad[gl] := v;
    mark[v] := 2;
  end;

procedure add(a, b: integer);
  begin
    inc(pos);
    list[pos] := b;
    next[pos] := head[a];
    head[a] := pos;
  end;

begin
  readln(n, m);
  gl := 0;
  for i := 1 to m do begin
    readln(a, b);
    add(a, b);
  end;
  for i := 1 to n do dfs(i);
  for i := gl-2 downto 1 do write(ad[i], ' ');
  readln; readln;
end.