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, 15, ['b', '31', '4123', 'j', 'q', '6125', 'u', '1353', 'R', '89', '8489', '5489', 's', '2403', '989', 'q', 'N', '7339', '8673', '2991', '9243', '67', 'Y', '5829', '4673']