Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant string. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
Input: 6, 20, ['n', '3231', '7705', 't', 'W', '9985', '3359', '9413', '5919', '1105', '3459', '3425', 'J', '9727', 'Y', '325', '7547', 'O', 'I', 'G', '6723', 'U']

9985335994135919110534593425J9727Y3257547OIG