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: 9, 21, ['5739', '8137', 'J', '5841', '671', '3389', 'm', 'j', 'W', '4955', 'p', '5575', 'j', 'p', '2421', 'C', '4233', '8809', '4375', '5303', 'X', '357']

X5303437588094233C2421pj5575p4955W