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.

[EX Q]: 3, 4, ['4887', 'N', 'y', '2813', 'C', 'J', 'v', '3199']
[EX A]: 3182y

[EX Q]: 4, 9, ['6451', '9261', 's', '5587', 'D', '7595', 'D', 'E', 's', '8841', 'Y']
[EX A]: sED5957D7855

[EX Q]: 8, 9, ['b', '4713', 'F', '9763', '4751', '4491', '9631', 'g', 'R', '5205', 'H', '1653', 'n', 'y']
[EX A]:
Rg