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, 11, ['W', '1079', '3809', '2697', '2897', 'U', '9165', 'S', '9687', '3873', 'c', '2877', '3045', '4511', '1227', '3451', 'O', '3347', '9909', '1653', 'x', 'L', '5489', 'j', 'i']