diff --git a/aoc.bqn b/aoc.bqn
index 428eeeb..7e25554 100644
--- a/aoc.bqn
+++ b/aoc.bqn
@@ -12,12 +12,12 @@ Day1 ⇐ (⊑ ⋈ (+´3⊸↑))∘(∨+´¨)∘Split∘(•BQN⎊0¨)∘•FLine
 
 Day2 ⇐ {
   B ← ⊣ (A ← {1+𝕩+3×3|1+𝕩-𝕨}) {3|𝕨+𝕩-1}
-  +´˘⍉ (A≍B)´∘{a‿s‿b:⟨a-'A',b-'X'⟩}˘ >•FLines 𝕩
+  +´ (A⋈B)´∘{"AX"-˜0‿2⊏𝕩}¨ •FLines 𝕩
 }
 # ⟨ 17189 13490 ⟩
 
 Day3 ⇐ {
-  Prio ← ⊢ - ⊑⟜"`&"∘(≤⟜'Z')
+  Prio ← ⊢ - ≤⟜'Z'◶"`&"
   A ← +´∘∾ {(Prio¨×∊⟜𝕩)𝕨}○⍷´∘(<˘ 2‿∘⊸⥊)¨
   B ← +´∘∾ {a‿b‿c:(Prio¨a)×b∧○(a⊸∊)c}¨∘(3⊸Chunk)∘(⍷¨)
   (A⋈B) •FLines 𝕩
@@ -25,10 +25,10 @@ Day3 ⇐ {
 # ⟨ 7683 2488 ⟩
 
 Day4 ⇐ {
-  Line ← •BQN∘> '‿'⍟(∊⟜"-,")¨ # hehe
-  F ← {∨´∧´˘≥´⎉1(2¨↕3)⥊𝕩⊏˜𝕨-'a'}
+  Line ← •BQN '‿'⍟(⊑∊⟜"-,")¨ # hehe
+  F ← {∨´∧´˘≥´⎉1(3⥊2)⥊𝕩⊏˜𝕨-'a'}
   A ← "cabddbac"⊸F, B ← "cabcacda"⊸F
-  +´(A⋈B)∘Line¨•FLines 𝕩
+  +´ (A⋈B)∘Line¨ •FLines 𝕩
 }
 # ⟨ 536 845 ⟩
 # •Show Day4 ⊑•args