program filip;
var a,b,a2,b2:string[3];
    a1,b1,koda,kodb:integer;
begin
     readln(a,b);
     insert(a[3],a2,1);
     insert(a[2],a2,2);
     insert(a[1],a2,3);
     insert(b[3],b2,1);
     insert(b[2],b2,2);
     insert(b[1],b2,3);
     val(a2,a1,koda);
     val(b2,b1,kodb);
     if a1>b1 then writeln(a1)
              else writeln(b1);
end.