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, 18, ['q', '5605', 'R', '3037', 'C', 'H', 'v', '6335', 'G', 'A', '8829', '2225', '5359', '1991', '2547', '971', '8687', 'e', '791', '2423', 'h', '105', 'A', '5635', 'K', '1441', '3285', '8279', 'A', '8697']

e868797125471991535922258829AG6335vH