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: 2, 20, ['L', 'D', '1103', '3419', 'Q', '3919', 't', '6593', '9303', '5943', 'q', '9641', '9881', '9821', '2921', '2393', 'D', 'u', '7497', '1005', 'n']

10057497uD23932921982198819641q594393036593t3919Q34191103D