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-rw-r--r--users/sterni/exercises/aoc/lib.bqn1
1 files changed, 1 insertions, 0 deletions
diff --git a/users/sterni/exercises/aoc/lib.bqn b/users/sterni/exercises/aoc/lib.bqn
index 37c518d1fd61..e870a5dfa426 100644
--- a/users/sterni/exercises/aoc/lib.bqn
+++ b/users/sterni/exercises/aoc/lib.bqn
@@ -1,4 +1,5 @@
 IsAsciiNum ⇐ ('0'⊸≤∧≤⟜'9')
+IsAlpha ⇐ (('a'⊸≤∧≤⟜'z')∨('A'⊸≤∧≤⟜'Z'))
 
 # based on leah2's function
 ReadInt ⇐ {