Here are a few variations:
$_ = 'aaaaaaaaaa';
push @list, pos() while /a/g;
my @list = (length'a' .. length'aaaaaaaaaa');
my @b = ('a'..'j');
my @a = ('a');
my @list = @a..@b;
$_ = 'xaaaaaaaaaa';
my @list = y/x// .. y/a//;
open(OUT,"+>out.lines")||die "can't $!";
push @list, $. while <OUT>;
UPDATE: chipmunk pointed out that I used 0 in the seek --- fixed.
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