In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

[EX Q]: 8, 21, ['7449', 'R', '469', 'm', 'A', '817', '9583', '239', 'n', '3597', 'C', '6853', '2745', '3827', '5775', 'x', '3875', '7503', '8903', '9679', '819']
[EX A]: 8199679890375033875x5775382727456853C3597n239

[EX Q]: 3, 14, ['a', '4703', 'I', 'q', 'P', 'J', '8387', 'I', '3277', 'p', 'X', '8093', 'u', '5989', 'F', 'y', 'X', 'm', 'R', '1003', 'o']
[EX A]: 5989u8093Xp3277I8387JPqI

[EX Q]: 11, 12, ['P', '2913', 'A', '3069', '7073', '1265', 'T', '129', '9165', 'd', 'h', '8915', 'i', '9285', 'D', 'W', '1105', '1493', 'M', '6375', 'J', 'j', '4145', '4557', '1483', 'R', 'Q', '3149']
[EX A]:
8915h