var
  s, si, sm: string;
  i, n: integer;
  f: Text;

begin
  Assign(f, 'input.txt');
  Reset(f);
  Readln(f, s);
  Close(f);
  Assign(f, 'output.txt');
  Rewrite(f);
  n := Length(s);
  sm := Copy(s, 2, n - 1);
  for i := 2 to n do
  begin
    si := s;
    Delete(si, i, 1);
    if sm < si then sm := si
  end;
  Writeln(f, sm);
  Close(f)
end.