You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task you will be given a list of strings and you need to concatenate them.

['a', 'b', 'c']
Solution: abc
Why? The strings 'a', 'b', 'c', got concatenated into the string 'abc'. So this is a good example.

New input: ['had', 'D', 'x', 'a']
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
hadDxa