In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

Example Input: 9, 21, ['D', 'j', 'T', '91', 'W', '9709', 'H', '1023', '4595', '1241', '917', '383', '7739', 'G', 'I', 'b', '8401', '7941', 'j', '2713', 'K', '2443', 'E', 'B', '1515', '5141', '1221', '993']
Example Output: K3172j14971048bIG937738371914215954

Example Input: 5, 6, ['7319', 'U', 'Z', '1163', '8123', '4861', '117', '3893', '2489', 'S', '1511']
Example Output: 16843218

Example Input: 15, 19, ['n', '739', '8753', '7097', 'n', 'V', '8379', '2209', '6995', 'y', 'T', 'k', '2257', 'l', 'h', '8645', 'B', '8985', 'm', 'v', 'r', '7813', 'n', 'X', '5911', 'e', '8149']
Example Output:
m5898B5468h