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.
3, 21, ['f', 't', '3149', '5335', 'I', '5025', '3551', '5139', 'J', '6381', '7883', '8353', '5481', 'u', '9671', '4891', '8859', 'p', '3765', 'Y', '4625', '3315', 'k', 'a', 'T', '2733', '8667', '3555', '3785']