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: 12, 20, ['T', '9007', '6857', '2299', 'y', '6547', 'n', '2735', '8025', 'O', '5979', '6863', 'R', 'O', '5955', '9393', 'S', '3235', 'V', '5991', 'C']

5991V3235S93935955OR6863