diff --git a/README.md b/README.md
index e8009b3..d24c06e 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ PHP library for helping developers with classmarks
 Add this to your composer require:
  * "unikent/lib-php-classmark": "dev-master"
 
-Then get lists like so:
+Then compare classmarks like so:
 ```
 $parser = new \unikent\Classmark\Classmark();
 
diff --git a/src/Classmark.php b/src/Classmark.php
index ce56aa9..c81237a 100644
--- a/src/Classmark.php
+++ b/src/Classmark.php
@@ -82,7 +82,7 @@ public static function parse($classmark)
         }
 
         // Strip off the first set of uppercase alpha characters.
-        if (preg_match('/(^[A-Z]{1,2})/', $classmark, $matches)) {
+        if (preg_match('/(^[A-Z]{1,3})/', $classmark, $matches)) {
             $subject = $matches[1];
             $classmark = trim(substr($classmark, strlen($subject)));
         }
@@ -127,7 +127,7 @@ public function get_subdivision()
 
     /**
      * Comparison.
-     * Returns 0 if we match, 1 is we are greater than $classmark or -1 if we are less than $classmark.
+     * Returns 0 if we match, 1 if we are greater than $classmark or -1 if we are less than $classmark.
      */
     public function compareTo($classmark)
     {
@@ -143,7 +143,7 @@ public function compareTo($classmark)
                 $otherpieces = explode('.', trim($classmark->subdivision, '.\t\n\r'));
 
                 foreach ($pieces as $i => $piece) {
-                    if ($piece == $otherpieces[$i] || !isset($otherpieces[$i])) {
+                    if (!isset($otherpieces[$i]) || $piece == $otherpieces[$i]) {
                         continue;
                     }
 
diff --git a/tests/RangeTest.php b/tests/RangeTest.php
index eddf172..162506b 100644
--- a/tests/RangeTest.php
+++ b/tests/RangeTest.php
@@ -94,17 +94,30 @@ public function testAdvancedDottedSubdivision() {
         $classmarka = new \unikent\Classmark\Classmark("K", "600.Z9");
         $classmarkb = new \unikent\Classmark\Classmark("K", "3240.4");
         $range = new \unikent\Classmark\Range($classmarka, $classmarkb);
+        $this->assertTrue($range->contains(new \unikent\Classmark\Classmark("K", "601")));
+        $this->assertFalse($range->contains(new \unikent\Classmark\Classmark("K", "600")));
 
         $classmarka = new \unikent\Classmark\Classmark("BS", "476.R45");
         $classmarkb = new \unikent\Classmark\Classmark("BS", "2560");
         $range = new \unikent\Classmark\Range($classmarka, $classmarkb);
+        $this->assertTrue($range->contains(new \unikent\Classmark\Classmark("BS", "479")));
+        $this->assertFalse($range->contains(new \unikent\Classmark\Classmark("BS", "475")));
 
         $classmarka = new \unikent\Classmark\Classmark("BR", "1.S3");
         $classmarkb = new \unikent\Classmark\Classmark("BR", ".481.R3");
         $range = new \unikent\Classmark\Range($classmarka, $classmarkb);
+        $this->assertTrue($range->contains(new \unikent\Classmark\Classmark("BR", "2")));
+        $this->assertFalse($range->contains(new \unikent\Classmark\Classmark("BR", "3987")));
 
         $classmarka = new \unikent\Classmark\Classmark("PN", "513");
         $classmarkb = new \unikent\Classmark\Classmark("PN", "1993.5.G7.H552");
         $range = new \unikent\Classmark\Range($classmarka, $classmarkb);
+        $this->assertTrue($range->contains(new \unikent\Classmark\Classmark("PN", "514")));
+        $this->assertTrue($range->contains(new \unikent\Classmark\Classmark("PN", "1993")));
+        $this->assertFalse($range->contains(new \unikent\Classmark\Classmark("PN", "512")));
+        $this->assertFalse($range->contains(new \unikent\Classmark\Classmark("PN", "1994")));
+
+        $range = new \unikent\Classmark\Range(\unikent\Classmark\Classmark::parse("KJE 6467"), \unikent\Classmark\Classmark::parse("KN 112.6"));
+        $this->assertFalse($range->contains(\unikent\Classmark\Classmark::parse('KJE946')));
     }
 }