In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.
23, 29, ['3335', '8381', 'i', 'W', '2869', 'L', '3825', '2709', '1339', '1883', 'o', 'b', '2737', 'y', '6927', '371', '4817', '761', '8103', '21', '7', 'W', '6965', '5031', '2159', '7681', '8251', '2469', '6817']