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diff --git a/challenge-133/abigail/ruby/ch-1.rb b/challenge-133/abigail/ruby/ch-1.rb
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+#!/usr/bin/ruby
+
+#
+# See ../README.md
+#
+
+#
+# Run as: ruby ch-1.rb < input-file
+#
+
+ARGF . each_line do
+ |num|
+ puts ((Math . exp(Math . log(num . to_i) / 2)) . to_i)
+end