Given the task definition, example input & output, solve the new input case.
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.
Example: 1, 3, ['238', 'h', '92', 'U', '2799']
Output: 29h832
Here, concatenating all the elements between the 1st element and 3rd element and then reversing the string gives '29h832'.

New input case for you: 6, 6, ['A', 'B', 'j', 'y', 'e', 'e', '9647', '9705', '3517', 'm', '3861', 'L', '4517', 'O', 'Q', 'l', 'I', 'F', '4887', '9559', 'L', 'D', '1409', 'o', 'W']
Output:
e