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]: 2, 9, ['7175', '1487', '4759', '8719', 'f', '9899', '1987', 'h', 'o', '5495', '3665', 'k', 'j', 'C', 'H', 'V', '9443', '1203', 'j', 'p']
[EX A]: oh78919989f917895747841

[EX Q]: 5, 6, ['u', 'O', 'l', '9119', 'P', '6983', 'H', '6701']
[EX A]: 3896P

[EX Q]: 1, 8, ['k', 'o', '9295', '4811', '139', 'R', '4741', '5065', '853', '6095', '4829', 'W', '2441', '9911', '6061', 'P', 'Q', 'O', '3863', 'n', '1857', '4459', 'l']
[EX A]:
56051474R93111845929ok