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: 17, 28, ['W', '1039', 'U', '929', 'L', '2751', 'V', 'U', 'a', 'H', 'N', '1037', '4327', '361', '95', '8901', '985', 'B', '9871', 'Z', 's', 'Q', 'M', '5407', 'R', 'x', 't', 'b', 'G']

btxR5407MQsZ9871B985