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: 10, 10, ['7719', 'K', '7323', '7843', '7079', 'y', '6777', 'M', 'S', 'v', 's', '4857', 'J', '8269', 'm']
Example Output: v

Example Input: 1, 2, ['4211', '3035', '3071', '3941', 'D', '1851']
Example Output: 53031124

Example Input: 5, 8, ['3867', 'y', '9137', 'R', '8739', 'o', 'r', 'M', '4125', '2715']
Example Output:
Mro9378