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:
2, 3, ['T', '9003', '3731', '287', '7101', 'm', '2147', '6123', '6319']

Ex Output:
13733009


Ex Input:
8, 12, ['C', 'w', 'Q', '8125', '4579', '8495', '363', 'a', 'C', 'T', '7905', '2631']

Ex Output:
13625097TCa


Ex Input:
7, 7, ['9775', 'B', 'I', '3897', '1853', 'B', '9805', 'D', '9093', 'K', 'n', '4335', 'F', 'b', '6425', 'W', '1977', '1857', '1535', 'c', 'b', '7407', '833', 't', '9303', '3823', 'b', 'J']

Ex Output:

5089