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diff --git a/challenge-102/abigail/python/ch-2.py b/challenge-102/abigail/python/ch-2.py
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+++ b/challenge-102/abigail/python/ch-2.py
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+#!/opt/local/bin/python
+
+#
+# See ../README.md
+#
+
+#
+# Run as python ch-2.py < input-file
+#
+
+import fileinput
+
+#
+# Working from the end of the required string backwards, we alternate
+# placing a hash, and placing a number. We place them in an array @out,
+# and at the end, print out said array in reverse order.
+#
+for index in fileinput . input ():
+    index = int (index)
+    out = []
+    hash = 0
+    while index > 0:
+        hash = not hash
+        if hash:
+            out . append ("#")
+            index = index - 1
+        else:
+            out . append (str (index + 1))
+            index = index - len (str (index + 1))
+    out . reverse ()
+    print ("" . join (out))