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: 5, 20, ['8309', 'x', 'x', 'V', '6111', '477', '5717', 'x', 'H', 'd', '1053', 'M', '6865', 'D', 'd', '6757', 'S', 'y', '8323', '5551', 'p', '677', '2517']

55518323yS6757dD6865M1053dHx57174776111