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.

Ex Input:
16, 17, ['E', '3657', 'O', 'B', 'V', '3761', 'v', '563', '1623', 'J', '5961', 'h', '5241', '9983', '3325', '1513', 'R']

Ex Output:
R3151


Ex Input:
4, 10, ['L', '6587', 'q', '9569', '6203', '443', '2975', '4641', '9195', '5775', 'y', 'K', '9665']

Ex Output:
577559191464579234430269659


Ex Input:
16, 21, ['U', '7401', 'o', '5661', 'b', 'b', '1943', 't', '2745', 'H', '8225', '3975', 'o', '9425', 'A', '8253', 'V', 'n', 'Z', 'K', '5533', 'y', 'E', '5339', 'j', 'T']

Ex Output:

3355KZnV3528