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+#!/usr/bin/env perl
+
+# Challenge 064
+#
+# TASK #2 > Word Break
+# Submitted by: Mohammad S Anwar
+#
+# You are given a string $S and an array of words @W.
+#
+# Write a script to find out if $S can be split into sequence of one or more
+# words as in the given @W.
+#
+# Print the all the words if found otherwise print 0.
+#
+# Example 1:
+# Input:
+#
+# $S = "perlweeklychallenge"
+# @W = ("weekly", "challenge", "perl")
+#
+# Output:
+#
+# "perl", "weekly", "challenge"
+# Example 2:
+# Input:
+#
+# $S = "perlandraku"
+# @W = ("python", "ruby", "haskell")
+#
+# Output:
+#
+# 0 as none matching word found.
+
+import itertools
+import unittest
+
+def word_break(S, *W):
+    k = len(W)
+    for words in itertools.permutations(W):
+        if ''.join(words) == S:
+            return ' '.join(W)
+    return "0"
+
+class TestWordBreak(unittest.TestCase):
+    def test_word_break(self):
+        self.assertEqual(word_break("perlweeklychallenge", "weekly", "challenge", "perl"),
+                         "weekly challenge perl")
+        self.assertEqual(word_break("perlandraku", "python", "ruby", "haskell"),
+                         "0")
+
+if __name__ == '__main__':
+    unittest.main()