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: 6, 15, ['k', '2277', '9657', '819', 'G', '479', '4613', '2505', '5833', 'b', '5493', 'T', '6767', '6139', '7527', '2513', 'L', 'K']

752761396767T5493b583325054613479