4 files changed, 57 insertions, 2 deletions
diff --git a/challenge-127/sgreen/README.md b/challenge-127/sgreen/README.md
index f9b8c29dad..a8fab60739 100644
--- a/challenge-127/sgreen/README.md
+++ b/challenge-127/sgreen/README.md
@@ -1,3 +1,3 @@
-# The Weekly Challenge 126
+# The Weekly Challenge 127
 
-Solution by Simon Green. [Blog](https://dev.to/simongreennet/weekly-challenge-126-19fg)
+Solution by Simon Green. [Blog](https://dev.to/simongreennet/weekly-challenge-127-4k6j)
diff --git a/challenge-127/sgreen/blog.txt b/challenge-127/sgreen/blog.txt
new file mode 100644
index 0000000000..ba34b341fc
--- /dev/null
+++ b/challenge-127/sgreen/blog.txt
@@ -0,0 +1 @@
+https://dev.to/simongreennet/weekly-challenge-127-4k6j
diff --git a/challenge-127/sgreen/perl/ch-1.pl b/challenge-127/sgreen/perl/ch-1.pl
new file mode 100755
index 0000000000..796c65dd69
--- /dev/null
+++ b/challenge-127/sgreen/perl/ch-1.pl
@@ -0,0 +1,22 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use feature 'say';
+use List::Util 'any';
+
+sub main {
+    # Turn the set into two arrays
+    my ( $set1, $set2 ) = @_;
+    my @set1 = ( $set1 =~ /(\d+)/g );
+    my @set2 = ( $set2 =~ /(\d+)/g );
+
+    # Turn the first set into a hash
+    my %set1 = map { $_, 1 } @set1;
+
+    # See if any values in the second set are in the hash
+    my $disjoined = ( any { exists $set1{$_} } @set2 ) ? 0 : 1;
+    say $disjoined;
+}
+
+main(@ARGV);
diff --git a/challenge-127/sgreen/perl/ch-2.pl b/challenge-127/sgreen/perl/ch-2.pl
new file mode 100755
index 0000000000..85b90fb1f4
--- /dev/null
+++ b/challenge-127/sgreen/perl/ch-2.pl
@@ -0,0 +1,32 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use List::Util 'any';
+
+sub main {
+    my @numbers = ( join( ' ', @_ ) =~ /(\d+)/g );
+
+    # Sanity check and pair up numbers
+    die "You must provide an even amount of numbers" if $#numbers % 2 == 0;
+
+    my @sets  = ();
+    my @match = ();
+
+    while (@numbers) {
+        my $first = shift @numbers;
+        my $last  = shift @numbers;
+
+        if ( any { $first <= $_->[1] and $last >= $_->[0] } @sets ) {
+            # This interval intersects with a previous one
+            push @match, [ $first, $last ];
+        }
+        # Add this interval to a list of previous intervals
+        push @sets, [ $first, $last ];
+    }
+
+    say '[ ', join( ', ', map { "($_->[0],$_->[1])" } @match ), ' ]';
+}
+
+main(@ARGV);