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]: 22, 23, ['6391', 'M', '8905', '3769', '9675', '4113', '9237', '8809', '8731', '1409', 'k', 'g', '6187', 'w', 'V', '2261', 'G', 'V', '2539', 'E', '2319', 'P', 'm', '8553', '6411']
[EX A]: mP

[EX Q]: 4, 6, ['w', '8785', '2921', 'J', 'P', 'g', '9273', '5439', 'O', 'F', 'u', '967', '9007']
[EX A]: gPJ

[EX Q]: 5, 5, ['1929', 'K', 'E', '6069', 'W', 'm', '8731', '2455', '2497', '4305']
[EX A]:
W