diff --git a/golf_prelude.rb b/golf_prelude.rb
index e45f4cafd9..204f659b0e 100644
--- a/golf_prelude.rb
+++ b/golf_prelude.rb
@@ -50,6 +50,11 @@ class Object
     puts "#{a}ello, #{b}orld#{c}"
   end
 
+  def f(m = 100)
+    1.upto(m){|n|puts'FizzBuzz
+'[i=n**4%-15,i+13]||n}
+  end
+
   alias say puts
 
   def do_while