Let's try this again!
my $word = 'abracadabra';
my @list = qw( a b c d e );
my %list = map { $_ => 1 } @list;
foreach (@list) {
delete $list{$_} if $word =~ s/\Q$_//;
}
@list = keys %list;
print("remaining word: ", $word, "\n"); # raaabra
print("remaining list: ", @list, "\n"); # e
outputs
remaining word: raaabra
remaining list: e
If you wish to replace all intances of the characters in @list, replace s/\Q$_// with s/\Q$_//g. The output would then be the following for the above snippet:
remaining word: rr
remaining list: e