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: 4, 4, ['Z', '7465', 'J', 'W']
Example Output: W

Example Input: 3, 3, ['2047', 'R', '6885', '1243', 'Z']
Example Output: 5886

Example Input: 2, 5, ['6509', 'K', '5993', '3751', 'Y', '6587', 'A', 'f', '4853', 'f', '8483', 'A', 'l', 'm', '5813', 'S']
Example Output:
Y15733995K