*** Eugene van der Pijll: 89 (11 19 13 25 21) ***
--- head.pl ---------------------------------------------
#!/usr/bin/perl -p
11..exit
--- tail.pl ---------------------------------------------
print+(<>)[-10..-1]
--- rev.pl  ---------------------------------------------
#!/usr/bin/perl -p
$\=$_.$\}{
--- mid.pl  ---------------------------------------------
#!/usr/bin/perl -p0
$_=$1while/.^(.+)^/ms
--- wc.pl   ---------------------------------------------
printf"%010d\n",$.,<>