diff --git a/src/ExecuteDay.php b/src/ExecuteDay.php
index 2857834..33ff7e5 100644
--- a/src/ExecuteDay.php
+++ b/src/ExecuteDay.php
@@ -9,14 +9,15 @@ use Symfony\Component\Console\Output\OutputInterface;
 
 class ExecuteDay extends Command
 {
-    protected int $day;
-
-    protected int $year;
     /**
      * @var string The title.
      */
     private string $title;
 
+    protected int $day;
+
+    protected int $year;
+
     /**
      * Configure the command.
      */
diff --git a/src/Puzzle.php b/src/Puzzle.php
index 23977ec..8b9a588 100644
--- a/src/Puzzle.php
+++ b/src/Puzzle.php
@@ -2,11 +2,11 @@
 
 namespace trizz\AdventOfCode;
 
+use trizz\AdventOfCode\Utils\SymfonyConsoleMarkdown;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
-use trizz\AdventOfCode\Utils\SymfonyConsoleMarkdown;
 
 class Puzzle extends Command
 {
@@ -14,7 +14,8 @@ class Puzzle extends Command
     {
         $this
             ->setName('puzzle')
-            ->addArgument('day', InputArgument::REQUIRED, 'The day number.');
+            ->addArgument('day', InputArgument::REQUIRED, 'The day number.')
+            ->addArgument('year', InputArgument::OPTIONAL, 'The year', date('y'));
     }
 
     /**
@@ -22,7 +23,14 @@ class Puzzle extends Command
      */
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
-        $contents = file_get_contents(sprintf('%s/../data/day%s/puzzle.md', __DIR__, (int) $input->getArgument('day')));
+        $contents = file_get_contents(
+            sprintf(
+                '%s/../data/Y%d/day%s/puzzle.md',
+                __DIR__,
+                $input->getArgument('year'),
+                (int) $input->getArgument('day')
+            )
+        );
         $rendered = (new SymfonyConsoleMarkdown())->render($contents);
 
         $output->writeln($rendered);
diff --git a/src/Solution.php b/src/Solution.php
index 94f606c..30cb06a 100644
--- a/src/Solution.php
+++ b/src/Solution.php
@@ -3,6 +3,9 @@
 namespace trizz\AdventOfCode;
 
 use JetBrains\PhpStorm\ArrayShape;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
 
 abstract class Solution
 {
@@ -90,7 +93,7 @@ abstract class Solution
         return !empty($this->exampleData);
     }
 
-    #[ArrayShape(['part1' => 'int|string', 'part2' => 'int|string'])]
+    #[ArrayShape(['part1' => "int|string", 'part2' => "int|string"])]
     public function results(bool $useExampleData = true): array
     {
         $data = $useExampleData ? $this->exampleData : $this->data;
diff --git a/src/Utils/Arr.php b/src/Utils/Arr.php
index 3649a1c..56651ab 100644
--- a/src/Utils/Arr.php
+++ b/src/Utils/Arr.php
@@ -4,4 +4,5 @@ namespace AdventOfCode21\Utils;
 
 class Arr
 {
+
 }
diff --git a/src/Y21/Day4.php b/src/Y21/Day4.php
index 9b05c7d..701ad73 100644
--- a/src/Y21/Day4.php
+++ b/src/Y21/Day4.php
@@ -12,22 +12,6 @@ class Day4 extends Solution
     public static int|string|null $part2ExampleResult = 1924;
     public static int|string|null $part2Result = 17435;
 
-    /**
-     * {@inheritdoc}
-     */
-    public function part1(array $data): int|string
-    {
-        return $this->playBingo($data, firstWins: true);
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function part2(array $data): int|string
-    {
-        return $this->playBingo($data, firstWins: false);
-    }
-
     /**
      * @param int[] $winningCard
      * @param int   $number
@@ -46,6 +30,22 @@ class Day4 extends Solution
         return (int) array_sum($unusedNumbers) * $number;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function part1(array $data): int|string
+    {
+        return $this->playBingo($data, firstWins: true);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function part2(array $data): int|string
+    {
+        return $this->playBingo($data, firstWins: false);
+    }
+
     /**
      * @param string $numberList
      * @param string $separator
diff --git a/src/Y21/Day6.php b/src/Y21/Day6.php
index 2309e86..792af80 100644
--- a/src/Y21/Day6.php
+++ b/src/Y21/Day6.php
@@ -2,6 +2,7 @@
 
 namespace trizz\AdventOfCode\Y21;
 
+use trizz\AdventOfCode\Solution;
 use JetBrains\PhpStorm\Immutable;
 use trizz\AdventOfCode\Solution;