Q: 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.
7, 18, ['q', 'g', '9157', '3035', 'K', '7923', 'k', '8091', '8895', '4333', 'M', 'N', '2235', 'P', 'Q', 'b', 'a', '9625', '8553', '7973', 'p', 'u', 'W', 'C', 'L', 'a']
A:
5269abQP5322NM333459881908k