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.
6, 25, ['6249', 'd', 'J', '5697', 'G', '6341', 'N', '7035', '3617', '9991', 'K', 'J', '4501', '6079', '5895', 'm', '4071', '3819', '8331', 'Y', '7985', 'i', '6837', 'f', 'w', 'i', '4685']