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]: 1, 2, ['e', 'F']
[EX A]: Fe

[EX Q]: 2, 4, ['1455', '7007', '7921', '3123', 'z', '743', '7895', 'W', 'y', '241', '6043', 'U', '3039', '8639', 'v', '4139', 'W', 'r', 's', '7947']
[EX A]:
321312977007