What is the technique to supply a list of values to a where clause?

I am working on a quick tool to update some records in an oracle
database.

The code is similar to some other tools I've cobbled together, but in
this case, the where clause has a "column in list" clause.  The
relevant pieces of code are:

my $aenlist = "(1127, 1557, 1661, 3030, 3982, 5205, 453, 8838,
9338)";
my $tmpsuper1 = 406;


    $updateSuper = $oraProdDBH->prepare
    (
        "UPDATE HR_INFO SET " .
            "SUPERVISOR_EMP_NO=? , REC_MOD_DATE=SYSDATE " .
        "WHERE " .
            "ALT_EMP_NO IN ? AND SUPERVISOR_EMP_NO = 0"
    ) or die "Failed to prepare - $DBI::errstr\n";
    $urc = $updateSuper->execute($tmpsuper1, $aenlist) or die "Failed
to execute - $DBI::errstr\n";

When I try to run the code, DBI returns an error saying that the value
supplied by $aenlist isn't a number. And that's true - it is a string.

So, I tried setting $aenlist to (1127, 1557, 1661, 3030, 3982, 5205,
453, 8838, 9338); and perl tells me there's a useless constant. That's
when I thought that what I really need to do was use @aenlist. Alas,
when I changed the execute to say
 my @aenlist = (1127, 1557, 1661, 3030, 3982, 5205, 453, 8838, 9338);
:
:
 my $urc = $updateSuper->execute($tmpsuper1, @aenlist) or die "Failed
to execute - $DBI::errstr\n"

; now I get a DBD::Oracle::st execute failed error that I called
execute with 10 variables when 2 were needed.

So, I am hoping someone might be able to point me to some information
about how to encode the execute so that I pass a list to the where
clause.

Thank you so much for your help.