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 Input:
1, 1, ['341', '939']

Ex Output:
143


Ex Input:
7, 17, ['j', '4189', 'N', 'y', 'K', '411', '7999', '8761', '3647', '2651', '805', 'e', 'K', 't', '2753', 'G', '9047']

Ex Output:
7409G3572tKe5081562746316789997


Ex Input:
7, 18, ['5091', '6901', 'y', '8675', '243', 'b', 'R', 'q', '6471', 'y', 'u', '8693', '361', '9653', 'D', 's', 'O', 'k', 'n', '9887', 'q', 'N', '8261', '3945', '1985', '23', '6723']

Ex Output:

kOsD35691633968uy1746qR