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:
4, 16, ['S', '5719', '173', 'P', 'a', '5791', 'e', '6279', 'q', '2585', '9533', 'r', '849', 'h', '3259', '3707', '4939', 'X', 'e']

Ex Output:
70739523h948r33595852q9726e1975aP


Ex Input:
5, 6, ['7565', '6525', '7421', 'u', '303', '1815', '273', '6725', 'i']

Ex Output:
5181303


Ex Input:
4, 5, ['w', 'T', 'l', '8351', 'G', 'Y', 'O', 'E', 'P', '2413', '9837', 'm', '4451', 'F']

Ex Output:

G1538