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 Input: 2, 2, ['z', '3345', 'l', '2657', 'J', '4313', 'K', '5307', '9087']
Example Output: 5433

Example Input: 2, 5, ['l', 'E', '729', 'U', 'z', '9729', '3247']
Example Output: zU927E

Example Input: 3, 12, ['8915', 'Y', 'u', 'u', '9503', '3369', '8997', 'q', '4995', '2875', 'i', 'U']
Example Output:
Ui57825994q799896333059uu