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.
16, 20, ['T', 'L', 'H', 'Q', '2145', 'Z', '8669', '4213', 'F', 'v', 'Y', 'X', 'K', '3301', '4297', '2135', '2829', '5561', 'W', 's', 'v', 'X', 'q', '4361', '3943', 'S']