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diff --git a/challenge-137/abigail/ruby/ch-2.rb b/challenge-137/abigail/ruby/ch-2.rb
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+++ b/challenge-137/abigail/ruby/ch-2.rb
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+#!/usr/bin/ruby
+
+#
+# See ../README.md
+#
+ 
+#
+# Run as: ruby ch-2.rb < input-file
+#
+
+def reverse (num)    
+    rev = 0
+    while num > 0 do
+        rev *= 10
+        rev += num % 10
+        num /= 10
+    end
+    return rev
+end
+
+def ly (num)
+    return num >= 10000000      ? 1
+         : num == reverse(num) ? 0
+         : ly(num + reverse(num))
+end
+
+ARGF . each_line do
+    | number |
+    puts (ly(number . to_i))
+end