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.

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

1, 2, ['3909', '5863', '707']
36859093

5, 6, ['Y', 'h', 'w', '9859', 'y', '5297', 'P']

7925y