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.
16, 20, ['635', '4565', '5133', '9061', '4373', 'F', 'c', 'U', '1003', '8343', 'V', '2159', '8415', 'B', '5439', 'R', 'h', '2161', 'z', 'P', 'g', '2191', 'F', '6235', 'L', 'D', 'z', 'Z', 'B', '3259']