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.
11, 18, ['R', 'E', 's', '1263', '6785', '9863', '7431', 'R', '3783', 'u', '3717', '6047', 'E', '5371', 'M', '63', '7397', '2999', 'S', '9341', '1533', 'Q', 'c', 'f', 'u', '7329', 'r', 'k', 'g', '4003']