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, 8, ['b', 'y', '8779', '3949', 'c', 'a', '111', '6649']
9466111ac94939778

2, 3, ['X', '8243', '1209']
90213428

7, 10, ['L', '9513', '6343', 'U', 'G', 'R', 'E', '1319', '627', '7825', 'A', 'E', 'D', 'I', '8781', '8555', '7651']

52877269131E