li@lix:~$ perl match11.pl
Can't locate Tie/Hash/Indexed.pm in @INC (you may need to install the Tie::Hash::Indexed module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.26.1 /usr/local/share/perl/5.26.1 /usr/lib/x86_64-linux-gnu/perl5/5.26 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.26 /usr/share/perl/5.26 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base) at match11.pl line 4.
BEGIN failed--compilation aborted at match11.pl line 4.