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: 6, 17, ['2971', 'X', 'L', 'w', 'p', '3907', '9161', '4313', '4977', 'W', '993', '721', 'Y', 'G', '6899', 'k', 'l', '7651', '5747', 'r', '2555', 'R', 'L', 'J']

lk6899GY721993W4977431391613907