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: 1, 2, ['5111', 'U', '441', '8381']
Example Output: U1115

Example Input: 2, 3, ['T', '2161', '227']
Example Output: 7221612

Example Input: 5, 7, ['j', 'S', '9737', '3491', '3545', 'u', 'L', '5201', '3129', '9799']
Example Output:
Lu5453