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: 1, 1, ['C', '6223']
Example Output: C

Example Input: 8, 15, ['l', 'p', '7691', 'q', '5663', '41', 'P', '2779', '7265', 'V', '4931', '8979', 'l', 'l', 'l', '45', '1245', 'F', '1139', '3531', '5337', '369', 'g', 'Q']
Example Output: lll97981394V56279772

Example Input: 10, 20, ['L', '7243', 'P', 't', 'S', '287', '9117', '9317', 'o', '6763', '7409', 'P', '2237', 'a', '3059', '6777', '8493', '8257', 't', 'l', '8411', '1795', 'Z', '7189', 'y', '7077', 'T']
Example Output:
lt7528394877769503a7322P90473676