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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-255/
+"""
+
+Task 2: Most Frequent Word
+
+Submitted by: [47]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a paragraph $p and a banned word $w.
+
+   Write a script to return the most frequent word that is not banned.
+
+Example 1
+
+Input: $p = "Joe hit a ball, the hit ball flew far after it was hit."
+       $w = "hit"
+Output: "ball"
+
+The banned word "hit" occurs 3 times.
+The other word "ball" occurs 2 times.
+
+Example 2
+
+Input: $p = "Perl and Raku belong to the same family. Perl is the most popular l
+anguage in the weekly challenge."
+       $w = "the"
+Output: "Perl"
+
+The banned word "the" occurs 3 times.
+The other word "Perl" occurs 2 times.
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 11th February
+   2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+"""
+### solution by pokgopun@gmail.com
+
+import re
+
+def mostFreqWord(p,w: str):
+    dct = dict()
+    for s in ( e.group(0) for e in re.finditer(r'\w+',p) if e.group(0) != w ):
+        dct[s] = dct.setdefault(s,0) + 1
+    mx = max(dct.values())
+    for e in dct.items():
+        if e[1] == mx: return e[0]
+
+import unittest
+
+class TestMostFreqWord(unittest.TestCase):
+    def test(self):
+        for (p,w), otpt in {
+                ("Joe hit a ball, the hit ball flew far after it was hit.","hit"): "ball",
+                ("Perl and Raku belong to the same family. Perl is the most popular language in the weekly challenge.","the"): "Perl",
+                }.items():
+            self.assertEqual(mostFreqWord(p,w),otpt)
+
+unittest.main()