7 files changed, 117 insertions, 1 deletions
diff --git a/challenge-273/sgreen/README.md b/challenge-273/sgreen/README.md
index 553de4d128..e0dd42e4d4 100644
--- a/challenge-273/sgreen/README.md
+++ b/challenge-273/sgreen/README.md
@@ -1,3 +1,3 @@
 # The Weekly Challenge 272
 
-Sorry, no blog this week.
+Blog: [Finding things](https://dev.to/simongreennet/finding-things-1f34)
diff --git a/challenge-273/sgreen/blog.txt b/challenge-273/sgreen/blog.txt
new file mode 100644
index 0000000000..50e547b719
--- /dev/null
+++ b/challenge-273/sgreen/blog.txt
@@ -0,0 +1 @@
+https://dev.to/simongreennet/finding-things-1f34
+\ No newline at end of file
diff --git a/challenge-273/sgreen/perl/ch-1.pl b/challenge-273/sgreen/perl/ch-1.pl
new file mode 100755
index 0000000000..5105c5a587
--- /dev/null
+++ b/challenge-273/sgreen/perl/ch-1.pl
@@ -0,0 +1,21 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+sub main ( $str, $char ) {
+    # Count the occurrences of the character in the string
+    my $occurrences = 0;
+    for my $pos ( 0 .. length($str) - 1 ) {
+        if ( substr( $str, $pos, 1 ) eq $char ) {
+            $occurrences++;
+        }
+    }
+
+    # Display the percentage of occurrences
+    say int( $occurrences / length($str) * 100 + 0.5 );
+}
+
+main( $ARGV[0], $ARGV[1] );
+\ No newline at end of file
diff --git a/challenge-273/sgreen/perl/ch-2.pl b/challenge-273/sgreen/perl/ch-2.pl
new file mode 100755
index 0000000000..59a0624a8f
--- /dev/null
+++ b/challenge-273/sgreen/perl/ch-2.pl
@@ -0,0 +1,13 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature 'say';
+use experimental 'signatures';
+
+sub main ($str) {
+    # Check that no 'a' is after the first 'b'
+    say $str =~ /^[^b]*b[^a]*$/ ? 'true' : 'false';
+}
+
+main(@ARGV);
+\ No newline at end of file
diff --git a/challenge-273/sgreen/python/ch-1.py b/challenge-273/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..98188f53ab
--- /dev/null
+++ b/challenge-273/sgreen/python/ch-1.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+from math import floor
+import sys
+
+
+def char_percentage(s: str, char: str) -> int:
+    """
+    Calculates the percentage of a given character in a string.
+
+    Args:
+        s (str): The input string.
+        char (str): The character to be counted.
+
+    Returns:
+        int: The percentage of the character in the string.
+    """
+    return floor(s.count(char) / len(s) * 100 + 0.5)
+
+
+def main():
+    result = char_percentage(sys.argv[1], sys.argv[2])
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-273/sgreen/python/ch-2.py b/challenge-273/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..8bf220971b
--- /dev/null
+++ b/challenge-273/sgreen/python/ch-2.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+
+import re
+import sys
+
+
+import re
+
+
+def b_after_a(s: str) -> bool:
+    """
+    Checks if the string 's' contains the letter 'a' does not appear after a 'b'.
+
+    Args:
+        s (str): The input string to be checked.
+
+    Returns:
+        bool: True if the criteria is met, False otherwise.
+    """
+    return re.search(r'^[^b]*b[^a]*$', s) is not None
+
+
+def main():
+    result = b_after_a(sys.argv[1])
+    print(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-273/sgreen/python/test.py b/challenge-273/sgreen/python/test.py
new file mode 100755
index 0000000000..8a25515973
--- /dev/null
+++ b/challenge-273/sgreen/python/test.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+
+import unittest
+ch_1 = __import__('ch-1')
+ch_2 = __import__('ch-2')
+
+
+class TestClass(unittest.TestCase):
+    def test_ch_1(self):
+        self.assertEqual(ch_1.char_percentage('perl', 'e'), 25)
+        self.assertEqual(ch_1.char_percentage('java', 'a'), 50)
+        self.assertEqual(ch_1.char_percentage('python', 'm'), 0)
+        self.assertEqual(ch_1.char_percentage('ada', 'a'), 67)
+        self.assertEqual(ch_1.char_percentage('ballerina', 'l'), 22)
+        self.assertEqual(ch_1.char_percentage('analitik', 'k'), 13)
+
+    def test_ch_2(self):
+        self.assertTrue(ch_2.b_after_a('aabb'))
+        self.assertFalse(ch_2.b_after_a('abab'))
+        self.assertFalse(ch_2.b_after_a('aaa'))
+        self.assertTrue(ch_2.b_after_a('bbb'))
+
+
+if __name__ == '__main__':
+    unittest.main()