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.
2, 10, ['6855', '1035', 'R', '7621', 'U', '8321', '7701', 'q', '9809', 'l', 'G', '9319', '8363', 'C', '3765', 'w', '9225', '7909', 'e', '499', 'K', '2341', 'f', '8747', 'F', 'n', '6647']