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:
6, 13, ['a', 't', '3699', 'H', 'c', 'S', '2713', '5419', 'q', '7877', 'q', 'U', '833', '8411', '2003', '5373', 'P', '2913']

Ex Output:
338Uq7787q91453172S


Ex Input:
13, 14, ['5913', '6823', '5945', 'a', '8191', 's', '5405', 'l', '2515', '3901', 'R', '1575', 'e', 'P', '9231', '39', '6651', 'N']

Ex Output:
Pe


Ex Input:
6, 17, ['9953', '3253', 'h', 'F', 'W', '5189', '9431', '7603', '8577', 'N', '2911', '4533', '2633', 'O', 'u', 'L', 'm', 'b', '9191', '7013', '9559', 'y', '5695', '5645', '6673', 'B', '2895']

Ex Output:

mLuO336233541192N7758306713499815