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.
--------
Question: 4, 20, ['p', '1643', 'O', '5867', 'Y', 'j', '2411', 'Z', '2563', '4757', 'B', 'b', '7489', '815', 'c', '6631', '8571', '6537', 'm', 'T']

Answer: Tm735617581366c5189847bB75743652Z1142jY7685


Question: 5, 6, ['7565', '6525', '7421', 'u', '303', '1815', '273', '6725', 'i']

Answer: 5181303


Question: 3, 7, ['a', '2107', '3449', 'm', '9863', '7505', '4347']

Answer:
743450573689m9443