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]: 13, 15, ['I', 'y', '3037', 'i', 'I', 'x', 'r', 'i', 'g', '1141', 'z', '8639', 'v', 'p', '7901', 'A', 'e', '7599']
[EX A]: 1097pv

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

[EX Q]: 4, 19, ['3937', '5919', '777', 'O', 'D', '9553', 'Y', 'E', 'w', '2091', 'Y', '301', 'Y', 'F', 'r', '6925', 'u', 'G', 'T', '1659', '2277', '1683', 'E', 'U', 'D', 'K', 'x', '3513']
[EX A]:
TGu5296rFY103Y1902wEY3559DO