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+#!/usr/bin/env python3
+# Python 3.9.2 on Debian GNU/Linux 11 (bullseye)
+
+print('challenge-216-task1')
+
+# Task 1: Registration Number
+# You are given a list of words and a random registration number.
+# Write a script to find all the words in the given list that has every letter in the given registration number.
+
+# Example 1
+# Input: @words = ('abc', 'abcd', 'bcd'), $reg = 'AB1 2CD'
+# Output: ('abcd')
+
+# Example 2
+# Input: @words = ('job', 'james', 'bjorg'), $reg = '007 JB'
+# Output: ('job', 'bjorg')
+
+# Example 3
+# Input: @words = ('crack', 'road', 'rac'), $reg = 'C7 RA2'
+# Output: ('crack', 'rac')
+
+def registration_number(reg: str, words: list[str]) -> list[str]:
+    out = []
+    print(f"Input: words = ({words}), reg = '{reg}'")
+    r = set( [ i for i in reg.lower() if i.isalpha() ])
+    for word in words:
+        w = set(word.lower())
+        if r.issubset(w): out.append(word)
+    return out
+
+
+def main():    
+    print("Output: ", registration_number('AB1 2CD', ['abc', 'abcd', 'bcd']),    "\n")
+    print("Output: ", registration_number('007 JB',  ['job', 'james', 'bjorg']), "\n")
+    print("Output: ", registration_number('C7 RA2',  ['crack', 'road', 'rac']),  "\n")
+
+
+if __name__ == '__main__':
+    main()