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, 3, ['4601', '1107', 'R']
Example Output: R7011

Example Input: 3, 8, ['b', 'y', '8779', '3949', 'c', 'a', '111', '6649']
Example Output: 9466111ac94939778

Example Input: 2, 3, ['y', '8887', 'e']
Example Output:
e7888