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.

1, 2, ['7921', 'Q']
Q7921

12, 17, ['8471', '9863', '8113', 'v', 'R', '1465', 'Q', '7039', '3795', '1969', '7215', '7069', 'k', 'e', '8401', 's', '961']
961s8401ek7069

6, 15, ['8525', '4097', 'l', '4985', '2023', '2023', 'n', 'H', '6049', '2533', '2577', '8275', 'x', '8787', 'G']

G8787x8275257725336049Hn2023