program Untitled;
var
   a, b, c, d : integer;
begin
     readln ( a, b );
     c := (a div 100) + (((a mod 100) div 10) * 10) + ((a mod 10) * 100);
     d := (b div 100) + (((b mod 100) div 10) * 10) + ((b mod 10) * 100);
     if c > d then writeln ( c );
     if d >= c then writeln ( d );
readln;
end.