Good candidate for an OBFU. :-)
In the following example, $found is the number of unique vowels found in your string. Just test if it is equal to 5.
use strict;
use warnings;
my $word = "alighthousa";
my $found;
if (($found = ( keys %{{map { $_ => 1 } ($word =~ m/([aeiou])/g) }} ))
+ == 5) {
print "Found all 5 vowels\n";
} else {
print "Found only $found vowels\n";
}
Ok, may be I should explain what is happenning here:
($word =~ m/([aeiou])/g)
# returns a list of all vowels found in $word
map { $_ => 1 } ($word =~ m/([aeiou])/g)
# builds a list for initializing a hash
{ map { $_ => 1 } ($word =~ m/([aeiou])/g) }
# a reference to an anonymous hash initialized with the list
keys %{ { map { $_ => 1 } ($word =~ m/([aeiou])/g) } }
# return keys of the dereferenced anonymous hash
# the keys in a hash are unique, this effectively
# eliminates duplicates, and gives a list of unique
# vowels found in the string
$found = ( keys ... )
# this assigns the number of unique vowels found into $found
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