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:
22, 26, ['V', 'O', '511', 'c', '4015', 'P', 'R', 'L', '115', 'L', '6809', 'S', '2397', 'X', 'e', 'Y', 'I', 'O', '8125', 'u', 'r', '9403', 'Q', 'i', '5835', 'U', 'm']

Ex Output:
U5385iQ3049


Ex Input:
2, 5, ['n', '8897', '6611', '2857', 'p']

Ex Output:
p758211667988


Ex Input:
10, 17, ['s', 'E', '6481', '3909', '3431', 'u', '1819', '1007', 'f', 'Q', '7935', '4851', 'R', 'F', '1151', '687', '9837', 'Z']

Ex Output:

73897861511FR15845397Q