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, 7, ['1247', 's', 'J', 'w', 'X', '7211', 'c']

Ex Output:
c1127Xw


Ex Input:
3, 10, ['3679', 'U', '3733', '703', 'E', 'q', '7811', 'l', '2705', 'j', 'i']

Ex Output:

j5072l1187qE3073373