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: 13, 20, ['D', '9947', 'e', '4221', '9201', 'f', 'm', '9803', 'G', 'K', '6961', 'H', '9007', '7249', '2635', 'T', '8597', '2883', 'W', '8159', 'u', '437', '9561', '4923', '8083', '6421', '5271', 'N', 'B']

8159W28838597T263572499007