package Aa;
use warnings;
#no warnings 'void'; 
use strict;
#no strict 'refs';

package Bb;
#>> when you uncomment this, it wont work!!
#use strict;
#use warnings;
#<<
	
my $strict = eval('package Aa;my $h;BEGIN { $h = ${^H} };return $h;');
printf "use strict " . ($strict == 1794 ? 'yes' : 'no') . "\n";
my $warn = eval('package Aa;my $w;BEGIN { $w = ${^WARNING_BITS} };return $w;');
printf "use warnings " . (unpack('b*', warnings::bits('all')) == unpack('b*', $warn) ? 'yes' : 'no') . "\n";