diff --git a/day_03/2.rb b/day_03/2.rb
index 486041a..baf3aba 100755
--- a/day_03/2.rb
+++ b/day_03/2.rb
@@ -7,20 +7,20 @@ class Main
 
     $stdin.each_line do |line|
       nums = line.chomp.each_char.map(&:to_i)
-      largest_joltage = recurse(12, nums, [])
-      @sum += largest_joltage.join.to_i
+      memo = recurse(12, nums, [])
+      @sum += memo.join.to_i
     end
 
     puts @sum
   end
 
-  def recurse(i, nums, largest_joltage)
-    return largest_joltage if i == 0
+  def recurse(i, nums, memo)
+    return memo if i == 0
 
     max = nums[..-i].max
-    largest_joltage << max
+    memo << max
 
-    recurse(i - 1, nums[nums.find_index(max) + 1..], largest_joltage)
+    recurse(i - 1, nums[nums.find_index(max) + 1..], memo)
   end
 end