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: 11, 20, ['L', 'D', '8439', '9623', 'w', 'C', '7527', '8181', '8405', '885', '8467', 'n', '2865', 's', 'g', 'F', 'G', '601', '4201', '8893']

88934201601GFgs2865n8467