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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-278/
+"""
+
+Task 1: Sort String
+
+Submitted by: [51]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a shuffle string, $str.
+
+   Write a script to return the sorted string.
+
+     A string is shuffled by appending word position to each word.
+
+Example 1
+
+Input: $str = "and2 Raku3 cousins5 Perl1 are4"
+Output: "Perl and Raku are cousins"
+
+Example 2
+
+Input: $str = "guest6 Python1 most4 the3 popular5 is2 language7"
+Output: "Python is the most popular guest language"
+
+Example 3
+
+Input: $str = "Challenge3 The1 Weekly2"
+Output: "The Weekly Challenge"
+
+Task 2: Reverse Word
+"""
+### solution by pokgopun@gmail.com
+
+'''
+def sortString(string: str):
+    return " ".join(
+            e[:-1] for e in sorted(
+                string.split(), key=lambda x: x[-1]
+                )
+            )
+'''
+
+def rankWord(string: str):
+    i = 0
+    while string[i-1].isdigit():
+        i -= 1
+    return (int(string[i:]),string[:i])
+
+def sortString(string: str):
+    return " ".join(
+            e[1] for e in sorted(
+                rankWord(x) for x in string.split()
+                )
+            )
+
+import unittest
+
+class TestSortString(unittest.TestCase):
+    def test(self):
+        for inpt, otpt in {
+                "and2 Raku3 cousins5 Perl1 are4": "Perl and Raku are cousins",
+                "guest6 Python1 most4 the3 popular5 is2 language7": "Python is the most popular guest language",
+                "Challenge3 The1 Weekly2": "The Weekly Challenge",
+                }.items():
+            self.assertEqual(sortString(inpt),otpt)
+
+unittest.main()