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: 5, 5, ['7991', '8029', '9605', 'u', '9539', 'q', '3789', 'i', '8639', '7477']
Example Output: 9359

Example Input: 15, 16, ['4531', 'a', 'I', 'W', '1071', '1301', 'v', 's', '3521', '7203', '1157', 'w', '7201', 'a', 'I', 'z', 'V', 'X', 'j']
Example Output: zI

Example Input: 18, 21, ['3339', '9089', '2541', 'K', 'l', 'F', 'g', 'G', 't', '8225', 'j', '3471', '9227', 'I', 'U', '1369', '9101', 'I', '1297', '7773', 'd', 'J', '2869', 'H']
Example Output:
d37777921I