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: 16, 18, ['7121', 'b', 'P', '7771', 'l', 'I', '7817', '5185', '7989', 'H', '4449', '3859', '869', '9321', 'O', '6453', '6219', '8349', '5327', 'm', 'c', 'O', '1185', '2703', '9673', 'q']
Example Output: 943891263546

Example Input: 1, 2, ['8165', 'R', 'y', '9865', 'z', 'Z', '9719', '7485', '4049', 'm', 'V', '67', '6101', '5057', 'g', 'l', '6809', '1983', '1091', 'u', '9835']
Example Output: R5618

Example Input: 4, 9, ['2129', 'J', 'e', '1939', '9787', '3973', '257', '7777', '5949', '4335', 'w', '3765', '6717', '8625', '6515', '1023', '8159', 'f', 'T', 'F', 'J']
Example Output:
94957777752379378799391