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: 13, 20, ['7765', '3155', 'S', 'f', '6429', '1779', '5825', 'I', '2201', '7655', 'd', '5269', '8185', '3987', 'x', 's', '7647', 'e', 'H', 'l', 'Q', 'g', 'M']

lHe7647sx39878185