my @exclude = (2,5..8);
my @exclude_lkup;
$exclude_lkup[$_] = 1 for @exclude;
my $line = "1!2!3!4!5!6!7!8!9";
my @arr = split /!/, $line;
my @filtered = map $arr[$_], grep !$exclude_lkup[$_], 0..$#arr;
print("@filtered\n"); # 1 2 4 5
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