Merge remote-tracking branch 'upstream/master'

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diff --git a/challenge-110/abigail/python/ch-1.py b/challenge-110/abigail/python/ch-1.py
new file mode 100644
index 0000000000..63e3c8e69e
--- /dev/null
+++ b/challenge-110/abigail/python/ch-1.py
@@ -0,0 +1,19 @@
+#!/opt/local/bin/python
+
+#
+# See ../README.md
+#
+
+#
+# Run as: python ch-1.py < input-file
+#
+
+import fileinput
+import re
+
+for line in fileinput . input ():
+    plain = re . sub (r'\s+',             "",     line)  # Strip whitespace
+    plain = re . sub (r'^\+',             "00",   plain) # Replace leading +
+    plain = re . sub (r'^\([0-9][0-9]\)', "0000", plain) # Replace leading (NN)
+    if re . search (r'^[0-9]{14}$', plain):              # Chech for 14 digits
+        print (line, end = '')