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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-261/
+"""
+
+Task 2: Multiply by Two
+
+Submitted by: [46]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given an array of integers, @ints and an integer $start..
+
+   Write a script to do the followings:
+a) Look for $start in the array @ints, if found multiply the number by 2
+b) If not found stop the process otherwise repeat
+
+   In the end return the final value.
+
+Example 1
+
+Input: @ints = (5,3,6,1,12) and $start = 3
+Output: 24
+
+Step 1: 3 is in the array so 3 x 2 = 6
+Step 2: 6 is in the array so 6 x 2 = 12
+Step 3: 12 is in the array so 12 x 2 = 24
+
+24 is not found in the array so return 24.
+
+Example 2
+
+Input: @ints = (1,2,4,3) and $start = 1
+Output: 8
+
+Step 1: 1 is in the array so 1 x 2 = 2
+Step 2: 2 is in the array so 2 x 2 = 4
+Step 3: 4 is in the array so 4 x 2 = 8
+
+8 is not found in the array so return 8.
+
+Example 3
+
+Input: @ints = (5,6,7) and $start = 2
+Output: 2
+
+2 is not found in the array so return 2.
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 24th March
+   2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+"""
+### solution by pokgopun@gmail.com
+
+def MB2(ints: tuple, start: int):
+    while start in ints:
+        start *= 2
+    return start
+
+import unittest
+
+class TestMB2(unittest.TestCase):
+    def test(self):
+        for (ints, start), otpt in {
+                ((5,3,6,1,12),3): 24,
+                ((1,2,4,3),1): 8,
+                ((5,6,7),2): 2,
+                }.items():
+            self.assertEqual(MB2(ints,start), otpt)
+
+unittest.main()