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.

Ex Input:
2, 4, ['i', '4995', '8615', 'O']

Ex Output:
O86154995

Ex Input:
6, 10, ['W', '4485', 'x', '4885', '779', '5681', '5085', '3523', '2869', '3817', 'D', 'J', '5781', '4703', '8409', '7397', '1743', 'n', 'O', 'O', 'I', '2341', 'd']

Ex Output:
38172869352350855681

Ex Input:
3, 19, ['l', '3477', '6127', 'M', '3745', '9273', '275', 'v', '8347', '6407', '5405', 'V', '5255', '6407', '7713', '9077', '2545', '5157', 'J', 'R', '1847']

Ex Output:
J515725459077771364075255V540564078347v27592733745M6127