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.

8, 21, ['9847', '3163', 'L', 'E', 's', 'I', 'H', 'e', 'l', '8875', '547', 'F', '4221', '5105', '5409', 'M', '6617', 'Z', 'g', '9257', 'l', 'q', 'p', 'Q', '6755', '265', '9845']
l7529gZ7166M904550151224F7455788le

1, 5, ['d', 'p', 'B', 'i', '5865', '4569']
5685iBpd

6, 7, ['3523', '9411', '365', '749', 'W', '2821', '1389']

98311282