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.
14, 20, ['4701', '4437', '8749', 'U', '7015', '4107', 'D', 'E', 'k', '9271', '5611', '6345', '8729', '5787', '9387', '9591', '7085', '2507', 'P', '8281', 'H', 'N', 'D', '4229']