procedure ReverseDigits(var s: String);
const
digits = ['0' .. '9'];
var
c: Char;
p1, p2: Integer;
begin
p1 := 1;
p2 := Length(s);
while p1 < p2 do
begin
while (p1 < p2) and not (s[p1] in digits) do
inc(p1);
while (p1 < p2) and not (s[p2] in digits) do
dec(p2);
if p1 < p2 then
begin
c := s[p1];
s[p1] := s[p2];
s[p2] := c;
inc(p1);
dec(p2);
end;
end;
end;
var
s:string;
begin
readln(s);
ReverseDigits(s);
writeln(s);
end.