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, 6, ['1467', 'm', '9771', '6533', 'm', 'x', 'c', 'd', '3139']

Ex Output:
xm33561779m


Ex Input:
9, 14, ['d', '7259', 'A', 'U', '7005', 'P', '8215', '8925', 'e', 'x', '1265', 'H', '4075', 'J', 'G']

Ex Output:
J5704H5621xe


Ex Input:
5, 12, ['w', '6839', '3859', '8533', '5681', '9805', '6661', 'P', 'Z', '6575', '2947', 'R', 'D']

Ex Output:

R74925756ZP166650891865