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.
5, 25, ['B', '3811', 'g', 'h', 'P', '8867', '2121', '8953', 'I', 'q', '5979', 'x', '8575', '7189', '2855', '8443', '2909', '7773', 't', '8261', '311', '1723', 'G', 'r', '5187']