6 files changed, 167 insertions, 2 deletions
diff --git a/challenge-183/sgreen/README.md b/challenge-183/sgreen/README.md
index 3827d96ce5..dab33e5312 100644
--- a/challenge-183/sgreen/README.md
+++ b/challenge-183/sgreen/README.md
@@ -1,3 +1,3 @@
-# The Weekly Challenge 180
+# The Weekly Challenge 183
 
-[Blog](https://dev.to/simongreennet/weekly-challenge-180-4mi5)
+Blog: [Unique differences](https://dev.to/simongreennet/unique-differences-1cci)
diff --git a/challenge-183/sgreen/blog.txt b/challenge-183/sgreen/blog.txt
new file mode 100644
index 0000000000..c9968de7e1
--- /dev/null
+++ b/challenge-183/sgreen/blog.txt
@@ -0,0 +1 @@
+https://dev.to/simongreennet/weekly-challenge-180-4mi5
+\ No newline at end of file
diff --git a/challenge-183/sgreen/perl/ch-1.pl b/challenge-183/sgreen/perl/ch-1.pl
new file mode 100755
index 0000000000..ba88778a56
--- /dev/null
+++ b/challenge-183/sgreen/perl/ch-1.pl
@@ -0,0 +1,45 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental 'signatures';
+use feature 'say';
+
+use JSON;
+
+sub same_array ( $c, $d ) {
+    # Determine if they are the same array
+
+    # They aren't if they are different lengths
+    return if $#$c != $#$d;
+    for my $x ( 0 .. $#$c ) {
+        # Or if the value is different
+        return if $c->[$x] ne $d->[$x];
+    }
+
+    # They are the same!
+    return 1;
+}
+
+sub main ($y) {
+    my $array = decode_json($y);
+
+    my @solution = ();
+  I: foreach my $i ( 0 .. $#$array ) {
+
+        # See if we have found this list before
+        my $is_unique = 1;
+        foreach my $j ( 0 .. $i - 1 ) {
+            if ( same_array( $array->[$i], $array->[$j] ) ) {
+                next I;
+            }
+        }
+
+        # We haven't. Add it to the solutions
+        push @solution, $array->[$i];
+    }
+
+    say '(', join( ', ', map( "[" . join( ', ', @$_ ) . ']', @solution ) ), ')';
+}
+
+main( $ARGV[0] );
+\ No newline at end of file
diff --git a/challenge-183/sgreen/perl/ch-2.pl b/challenge-183/sgreen/perl/ch-2.pl
new file mode 100755
index 0000000000..6d8b7831ab
--- /dev/null
+++ b/challenge-183/sgreen/perl/ch-2.pl
@@ -0,0 +1,50 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+use Date::Calc 'Delta_Days';
+
+sub main ( $date1, $date2 ) {
+    # Make date2 the latest date
+    if ( $date2 lt $date1 ) {
+        ( $date2, $date1 ) = ( $date1, $date2 );
+    }
+
+    # Split the date parts
+    my ( $year1, $month1, $day1 ) = split /-/, $date1;
+    my ( $year2, $month2, $day2 ) = split /-/, $date2;
+
+    # Calculate the years between the two dates. If date2 is earlier in the
+    #  year than date1, then the year difference is one less
+    my $years = $year2 - $year1;
+    if ( $month2 < $month1 or ( $month2 == $month1 and $day2 < $day1 ) ) {
+        $years--;
+    }
+
+    # Calculate the days difference
+    my $days =
+      Delta_Days( $year1, $month1, $day1, $year2 - $years, $month2, $day2 );
+
+    # Print the output
+    my @diff = ();
+    if ( $years > 1 ) {
+        push @diff, "$years years";
+    }
+    elsif ( $years == 1 ) {
+        push @diff, '1 year';
+    }
+
+    if ( $days > 1 ) {
+        push @diff, "$days days";
+    }
+    elsif ( $days == 1 ) {
+        push @diff, '1 day';
+    }
+
+    say join ' ', @diff;
+}
+
+main(@ARGV);
+\ No newline at end of file
diff --git a/challenge-183/sgreen/python/ch-1.py b/challenge-183/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..64bd316ef4
--- /dev/null
+++ b/challenge-183/sgreen/python/ch-1.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+import sys
+import yaml
+
+
+def main(y):
+    array = yaml.safe_load(y)
+
+    solution = []
+    for i in range(len(array)):
+
+        # See if we have found this list before
+        is_unique = True
+        for j in range(i):
+            if array[i] == array[j]:
+                is_unique = False
+                break
+
+        if is_unique:
+            # We haven't. Add it to the solutions
+            solution.append(array[i])
+
+    print(*solution, sep=', ')
+
+
+if __name__ == '__main__':
+    main(sys.argv[1])
diff --git a/challenge-183/sgreen/python/ch-2.py b/challenge-183/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..92a8493bc5
--- /dev/null
+++ b/challenge-183/sgreen/python/ch-2.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+
+import sys
+from datetime import date
+from dateutil.relativedelta import relativedelta
+
+
+def main(date1, date2):
+    date1 = date.fromisoformat(date1)
+    date2 = date.fromisoformat(date2)
+
+    # Make date2 the latest date
+    if date2 < date1:
+        date2, date1 = date1, date2
+
+    # Calculate the years between the two dates. If date2 is earlier in the
+    #  year than date1, then the year difference is one less
+    years = date2.year - date1.year
+    if date2.month < date1.month or (date2.month == date1.month and date2.day < date1.day):
+        years -= 1
+
+    # Calculate the days difference
+    days = (date2 - relativedelta(years=years) - date1).days
+
+    # Print the output
+    diff = []
+    if years > 1:
+        diff.append(f'{years} years')
+    elif years == 1:
+        diff.append(f'1 year')
+
+    if days > 1:
+        diff.append(f'{days} days')
+    elif days == 1:
+        diff.append(f'1 day')
+
+    print(*diff, sep=' ')
+
+
+if __name__ == '__main__':
+    main(sys.argv[1], sys.argv[2])