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-# Challenge 220 tasks: Common Characters - Squareful
-**Challenge 220 solutions in Perl by Matthias Muth**
-
-## Task 1: Common Characters
-
-> You are given a list of words.<br/>
-> Write a script to return the list of common characters (sorted alphabeticall) found in every word of the given list.<br/>
-
-Lore ipsum...
-
-```perl
-sub task_1() {
-    return undef;
-}
-```
-
-## Task 2: Squareful
-
-> You are given an array of integers, @ints.<br/>
-> An array is squareful if the sum of every pair of adjacent elements is a perfect square.<br/>
-> Write a script to find all the permutations of the given array that are squareful.<br/>
-
-Lorem ipsum...
-
-```perl
-sub task_2() {
-    return undef;
-}
-```
-
-#### **Thank you for the challenge!**
diff --git a/challenge-220/matthias-muth/README-no-blog.md b/challenge-220/matthias-muth/README-no-blog.md
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-**Challenge 220 solutions in Perl by Matthias Muth**
-<br/>
-(no blog post this time...)
-
-**Thank you for the challenge!**