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.
13, 21, ['5085', '73', 'H', 'L', 'b', 'g', '423', '5301', 'J', 'N', '8287', '3903', '8635', 'i', '2501', '971', '6777', '2045', '8085', 'M', 'l', '5325', '513', 'B', 'V', 't', 'i']