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: 1, 15, ['7949', 'k', 'f', '6211', 'U', '4085', '3293', 'X', '8129', '6609', '5261', '4685', '5205', 'g', '9733', '9525', '6701', 'R', 't', '869', 'h', '6543', '143', '1559', '19']

9733g52054685526166098129X32934085U6211fk7949