instruction:
In this task you will be given a list of strings and you need to concatenate them.
question:
['both', 'B', 'f']
answer:
bothBf


question:
['f', 's', 'Y', 'F', 'by', 'a', 'N', 'as', 't']
answer:
fsYFbyaNast


question:
['N', 's']
answer:

Ns