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, 19, ['1247', 'w', '6657', '3757', '9313', 'u', '5655', 'n', '9559', '4017', '9041', 'n', 'w', '155', 'C', 'N', '6351', '9761', '5701', '3857', '6167', 'u']

Ex Output:
107516791536NC551wn140971049559n5565u


Ex Input:
5, 6, ['A', 'v', 'x', '2047', '5955', 'l', '4845', '1347', 'i', 'm', 'W', 'h', 'w', '4483', '1509']

Ex Output:
l5595


Ex Input:
12, 16, ['6085', 'U', '9101', '761', '3859', 'b', 'Y', 'g', '6455', 'V', '349', 'T', 'f', 'D', '8785', 'b', '1597', 'U']

Ex Output:

b5878DfT