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: 2, 16, ['H', 'K', 'q', 'w', 'v', 't', 'w', '9439', '8899', 'y', '1747', 'j', 'O', '25', '9379', 'B', '1521', 'u', '2303']

B937925Oj1747y88999439wtvwqK