{R+,S+,Q+,I+,O-}
{$R-,S-,Q-,I-,O+}
var
  u,q,n,d,i,j: longint;
  s: array [0..300010] of char;
begin
//  assign(input,'in'); reset(input);
//  assign(output,'out'); rewrite(output);
  read(n);
  if n mod 2 <> 0 then q:=2 else
  if n mod 3 <> 0 then q:=3 else
  if n mod 5 <> 0 then q:=5 else
  if n mod 7 <> 0 then q:=7 else
  if n mod 11 <> 0 then q:=11 else
  if n mod 13 <> 0 then q:=13 else
  begin
    q:=0;
    for i:=1 to n do s[i]:=Chr(Ord('a')+(i-1) mod 17);
    if n mod 8 = 0 then u:=9
    else u:=8;
    for i:=n div 2 to n do s[i]:=Chr(Ord('r')+(i-1) mod u);
  end;
  if q > 0 then
  begin
    for i:=1 to n div 2 do s[i]:=Chr(Ord('a')+(i-1) mod q);
    for i:=n div 2+1 to n do s[i]:=Chr(Ord('n')+(i-1) mod q);
  end;
{  for d:=1 to n-1 do
    if n mod d = 0 then
    begin
      j:=d+1;
      for i:=1 to n do
      begin
        if s[i] = s[j] then
        begin
          writeln('collision found for d = ',d);
          while true do;
          break;
        end;
        inc(j);
        if j > n then j:=1;
      end;
    end;  }
  for i:=1 to n do write(s[i]);
  writeln;
  close(input);
  close(output);
end.