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 Input:
7, 9, ['6997', '4095', '7629', '9191', 'l', '1345', '6633', 'Q', 'F', 'Z', '8353', '57']

Ex Output:
FQ6633


Ex Input:
4, 6, ['3783', '2617', '9287', 'W', '2595', 'Y', '9381', '1233', 'H', '2117', 'F', '4805', 'e', '8563', '7089', 'p', '5517']

Ex Output:
Y2595W


Ex Input:
12, 20, ['4367', 'U', 'y', 'n', 'x', '4847', '2509', '2041', '4725', 'n', '63', 'g', '4881', 'p', 'u', 'i', 'l', 'f', '6829', 'f', '7435', 'l', '1845', '8923']

Ex Output:

f6829fliup4881g