# XS code
SV*
useofuninit(SV* arg)
        INIT:
                char *p;
                STRLEN plen;
        PPCODE:
                p = SvPVx(p, plen);
                XSRETURN_UNDEF;

# Perl code

my $foo;
useofuninit(undef)

##</code><code>##

$"=$,,$_=q>|\p4<6 8p<M/_|<('=>
.q>.<4-KI<l|2$<6%s!<qn#F<>;$,
.=pack'N*',"@{[unpack'C*',$_]
}"for split/</;$_=$,,y[A-Z a-z]
         {}cd;print lc