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: 4, 19, ['7393', '3157', 'W', '9395', '5579', '6209', '6165', 'H', '7415', 'S', '1651', 'z', 'e', 'C', '4281', '8369', 'k', '139', 'T', '7803', '8509']

T139k83694281Cez1651S7415H6165620955799395