diff --git a/day1-standalone.quox b/day1-standalone.quox
index 2b1a733..18c4fa4 100644
--- a/day1-standalone.quox
+++ b/day1-standalone.quox
@@ -217,8 +217,8 @@ def minus : ℕ → ℕ → ℕ =
   case dup m return ℕ of { [m] ⇒
     elim-pair (λ _ _ ⇒ ℕ)
       0
-      (λ _ p   ⇒ succ p)
       (λ _ p   ⇒ p)
+      (λ _ p   ⇒ succ p)
       (λ _ _ p ⇒ p)
       m n
   }
@@ -311,17 +311,13 @@ namespace char {
     λ x y ⇒ nat.le (ord x) (ord y)
 
   def between : ω.Char → ω.Char → ω.Char → Bool =
-    λ lo hi c ⇒
-      case dup c return Bool of { [c] ⇒ bool.and (le lo c) (le c hi) }
+    λ lo hi c ⇒ bool.and (le lo c) (le c hi)
 
   def is-digit : ω.Char → Bool =
     between (chr 0x30) (chr 0x39)
 
   def digit : Char → ℕ =
     λ c ⇒ nat.minus (ord c) 0x30
-
-  #[compile-scheme "(lambda (c) (builtin-io (display c) (newline)))"]
-  postulate println : Char → IO Unit
 }
 
 def0 Char = char.Char