var
  s : string;
  i : integer;
begin
    readln(s);
    i := 1;
    while i < length(s) do
    begin
        if(s[i] >= '0') and (s[i] <= '9') and (s[i + 1] = ' ')then
        begin
          insert('+', s, i + 1);
          i := i + 1;
        end;
        i := i + 1;
    end;
    writeln(s);
end.