#!/usr/bin/perl
use strict;
use warnings;
sub foo ($) {
    my $x = shift;
    print "foo gets '$x'\n";
    return ($x+2, 33);
}
my @a = foo(42);   
print "a=@a\n";   
@a = sort(foo(42)); 
print "a=@a\n";  
@a = (sort foo(42));  
print "a=@a\n";    
@a = sort foo(42);  
print "a=@a\n";    

##</code><code>##

foo gets '42'
a=44 33
foo gets '42'
a=33 44
a=42
a=42