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:
20, 22, ['4065', 'I', '7721', 'x', '8903', 'S', '8877', 'W', 'j', '1835', '6933', '549', '7799', '8789', 'c', 'M', '6183', '3319', 'h', '8551', 'r', '2957', 'o', 'W', '9497', 'j', 'g', '3619']

Ex Output:
7592r1558


Ex Input:
8, 8, ['n', '9001', 't', 'e', 'W', '2287', 'f', '2735', 'z', '3065', 'J', '5609', 'e', 's', 'F']

Ex Output:
5372


Ex Input:
1, 23, ['y', '7233', '3797', 'y', 'n', '7871', '4823', '9855', '2243', '3575', '1329', '7399', 'B', 't', '3095', '5237', 'B', 'w', '1557', 'N', '4927', '5031', 'W', '7349', '1929', 'W', '3605']

Ex Output:

W13057294N7551wB73255903tB9937923157533422558932841787ny79733327y