1 files changed, 2 insertions, 0 deletions
diff --git a/2022/lib.lisp b/2022/lib.lisp
index 2441481..1d81219 100644
--- a/2022/lib.lisp
+++ b/2022/lib.lisp
@@ -27,6 +27,8 @@
           while line
           collect line)))
 
+(defun id (x) x)
+
 (defun all (pred lst)
   (if (not (cdr lst))
       (funcall pred (car lst))