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, 9, ['L', '883', 'l', 'x', 'A', 'R', '6395', '6723', '6439', 'f', 'q', 'R', '5345', '9431', 'f', '6755', 'j', 'u', '8117', 'F', '4929']

643967236395RAx