program filip;
var a,a1,a2,a3,a4,b4,b1,b2,b3,b,x,y:integer;
begin
readln (a,b);
a1:=a div 100;
a2:=a mod 100;
a3:=a2 div 10;
a4:=a2 mod 10;
b1:=b div 100;
b2:=b mod 100;
b3:=b2 div 10;
b4:=b2 mod 10;
x:=a4*100+a3*10+a1;
y:=b4*100+b3*10+b1;
if x>y then writeln(x) else writeln(y);

end.