In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

Example Input: 2, 27, ['d', 'L', 'o', '3417', 'J', '2183', '8813', '2469', '3583', '8225', 'o', 'q', 'N', '3215', 'V', 'f', '7371', 'F', '6797', 'R', 'X', '2245', 'P', 'v', '4347', 'k', 'K', 'O']
Example Output: Kk7434vP5422XR7976F1737fV5123Nqo52283853964231883812J7143oL

Example Input: 1, 13, ['497', 'v', '7469', 'c', '8913', '533', 'P', '3051', '2237', 'R', '9609', 'J', 'R', 'x', '5787', '2203', '5943', '6847', '8989', 'A', '5227', 'O', 'M', 'n', '4993']
Example Output: RJ9069R73221503P3353198c9647v794

Example Input: 20, 23, ['q', '4383', '7945', '2839', '2771', 'L', 'T', '7339', '87', 'o', '657', 'Q', 'Q', 'p', 'q', 'z', '6993', '811', 'w', 'j', '2733', '1147', 'u', 'N', 'v', 'm']
Example Output:
u74113372j