@@ -0,0 +1,235 @@
+//https://www.hackerrank.com/challenges/alternative-matching%0Apublic class Solution %7B    %0A  public static void main(String%5B%5D args) %7B%0A    Regex_Test tester = new Regex_Test();%0A    tester.checker(%22%5E(?:Mr%7CMr?s%7CDr%7CEr)%5C%5C.%5Ba-zA-Z%5D+$%22);%0A  %7D%0A%7D%0A

Create alternative-matching.java