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, ['w', 'e']
Example Output: e

Example Input: 4, 10, ['6935', '8323', '6167', 'I', 'G', 'f', '303', '3387', '3257', '3069', 'q', 'r', '187', 'k', '6031', '8221', '721']
Example Output: 960375237833303fGI

Example Input: 9, 18, ['5043', 'v', '4605', 'L', 'N', 'G', 'r', '1415', 'M', 'y', '3731', '3351', '35', 'I', 'w', '3021', 'z', 'O', '4461', '6131', '3695', '695', '8457']
Example Output:
Oz1203wI5315331373yM