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: 5, 15, ['7917', '8337', 'R', '1173', '2919', 'a', 'T', 'W', 'B', 'b', 'o', 'Z', 'H', '6785', 'M', 'i', '6023', '1709', 'z', 'T', 'x', 'X', 'k', 'U', '5531', 'x', 'q', 'n', '9357', 'n']

M6785HZobBWTa2919