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: 5, 18, ['2531', 'm', '5373', '6921', 'L', 'g', '2207', 's', 'f', 'K', '6447', 'a', 'q', '503', 'L', 'K', '4947', 'F', '8275', 'g', 'p', 'i', '3557', '2713', 'v', 'N', '3831']

Lg2207sfK6447aq503LK4947F