Definition: 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.
Input: 7, 16, ['a', 'R', 'J', 'Q', '5823', '3945', 'E', '2797', 'B', 'e', 'C', 'A', 'e', 'C', '8231', 'E', 't', '5691', 'y', '7359', 'r', '1933', '9103']

E8231CeACeB2797E