program zad;
uses crt;
const n= 10;
var a,b,k: integer;
i,f: integer;
Begin
for a:=1 to 9 do
   for b:=0 to 9 do begin
      k:=(a*10)+b;
      f:=(a+b)*3;
   if f=k then writeln(a,b);
         end; readln;
end.