const
  digit = '0123456789';
Var
  s: string;
  i: byte;
begin
  writeln ('Vvedi stroky');
  readln (s);
  for i := length(s) downto 1 do
    if pos(s[i], digit) > 0 then delete(s, i, 1);
  writeln(s);
  readln;
end.