$x = join('', sort @harry);
print ($x eq 'AbelCaincatdogx' ? "ok 1\n" : "not ok 1\n");
-$x = join('', sort backwards @harry);
+$x = join('', sort( backwards @harry));
print ($x eq 'xdogcatCainAbel' ? "ok 2\n" : "not ok 2\n");
$x = join('', sort @george, 'to', @harry);