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, 7, ['P', 'P', 'H', 'r', '3563', 'n', 'M', '1577', '6453']
[EX A]: Mn3653rH

[EX Q]: 5, 9, ['7453', '7415', 's', 'O', '1161', 'G', 'N', '5925', '3367', 'f', '7739', 'b', 'y', 'o', '2431', 'Y']
[EX A]: 76335295NG1611

[EX Q]: 6, 15, ['9781', 'o', 'W', '8823', '7851', '6053', 'i', '2707', '6921', 'P', '7377', 'Y', 'M', '6775', '2195', '1825', 'b', 'g', 'V', '8915', '6273', 'j', 'X', 'y']
[EX A]:
59125776MY7737P12967072i3506