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.

[Q]: 5, 6, ['9891', '9721', 'q', 'u', '8721', 'l', 'm', 'p']
[A]: l8721


[Q]: 5, 7, ['l', '3735', 't', 'D', 'M', 'G', 'p', '7645', 'u']
[A]: pGM


[Q]: 13, 15, ['p', '6451', 'n', 'n', '2997', '9333', 'g', 't', '7219', 'g', '7853', 'q', 'U', 'U', '789', 'A', 'U', '159', '845', 'c', 'f', '8531', 'p', 'd', 'e']
[A]:
789UU