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: 6, 13, ['a', 't', '3699', 'H', 'c', 'S', '2713', '5419', 'q', '7877', 'q', 'U', '833', '8411', '2003', '5373', 'P', '2913']
Example Output: 338Uq7787q91453172S

Example Input: 18, 22, ['I', '4687', 'V', 'y', 'U', '2255', '6971', '793', 'W', 'O', '3233', '5061', '6355', 'X', 'U', '8435', 'e', 'z', 'u', '6055', 'd', '1493', 'e', '4453', 'X']
Example Output: 3941d5506uz

Example Input: 1, 6, ['c', '1953', 'b', '9403', 'x', 'r', 'Q', 'f']
Example Output:
rx3049b3591c