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:
1, 1, ['C', '6223']

Ex Output:
C


Ex Input:
6, 7, ['753', '4657', 'h', '13', '593', 'I', '7689', '717']

Ex Output:
9867I


Ex Input:
3, 16, ['2675', 'A', 'J', '5395', '5791', '3177', 'X', 'G', 'x', 'E', 'Y', '2455', 'y', 't', '6695', 'D', '1435', '8071', '1643', 'B', 'i', '8145']

Ex Output:

D5966ty5542YExGX771319755935J