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 find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output 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. Perform the operations in order, i.e., do not concatenate the elements and then reverse the string.
Input: 3, 15, ['661', '5177', '171', '6139', 'v', '7237', 's', '4815', '2747', 'P', 'P', '3969', '9261', 'g', 'H', 'C', '4915', 'x']

Hg92613969PP27474815s7237v6139171