program xxor;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var i,a,b,x:int64;

begin
readln(a,b);
i:=0; p:=false;
while  not(p)and(i<=a dov 2) do
begin
if x xor (a-x)= b then p:=true; writeln(x,' ',a-x);
end;
end.