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]: 1, 15, ['5997', '2005', '8529', 'j', 'T', '9729', 'T', 'm', '357', '779', '2253', '725', 'z', '4149', '2913', '8135', 'Q', 'B']
[EX A]: 31929414z5273522977753mT9279Tj925850027995

[EX Q]: 1, 2, ['6611', 'A', '8953']
[EX A]: A1166

[EX Q]: 5, 7, ['3271', '6611', 'N', 'm', '1999', '2103', 'q', 's', '527', '9737', '9527', 'S', '5945', '4575', 'd', '8611', '5545', 'b', 'q', 'c', '3467', '675', '5063', 'w', 'b', 'o', 'E', 'B', '7463']
[EX A]:
q30129991