Merge branch 'master' of https://github.com/manwar/perlweeklychallenge-club

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diff --git a/challenge-057/paulo-custodio/python/ch-2.py b/challenge-057/paulo-custodio/python/ch-2.py
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+++ b/challenge-057/paulo-custodio/python/ch-2.py
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+#!/usr/bin/env python3
+
+# Challenge 057
+#
+# TASK #2 › Shortest Unique Prefix
+# Write a script to find the shortest unique prefix for each each word in the
+# given list. The prefixes will not necessarily be of the same length.
+#
+# Sample Input
+#     [ "alphabet", "book", "carpet", "cadmium", "cadeau", "alpine" ]
+# Expected Output
+#     [ "alph", "b", "car", "cadm", "cade", "alpi" ]
+
+import re
+import sys
+
+def shortest_prefix1(word, words):
+    for i in range(1, len(word)):
+        prefix = word[:i]
+        found = 0
+        for x in words:
+            if re.search(r'^'+prefix, x):
+                found += 1
+        if found == 1:
+            return prefix
+    return word
+
+def shortest_prefix(words):
+    prefixes = []
+    for word in words:
+        prefixes.append(shortest_prefix1(word, words))
+    return prefixes
+
+print(" ".join(shortest_prefix(sys.argv[1:])))