In this task you will be given a list of strings and you need to concatenate them.

['c', 'a']
ca

['h', 'X', 'j', 'the', 't', 'f', 'e', 'Q', 'of', 'D', 'L', 'unknown', 'l']
hXjthetfeQofDLunknownl

['a', 'l', 'the', 's', 'against', 's', 'i']

althesagainstsi