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.
15, 17, ['I', 'L', 'd', 'e', '5871', 'V', '3285', '1849', '5975', 'c', '5705', '1007', 'x', 'i', 'b', 'I', '9619', '2679', '7473', '8837', 'n', 'W']