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:
3, 18, ['R', '7241', 'A', 'z', '8115', '6251', 'F', '1405', 'N', '3567', '1525', 'a', '6057', 'E', '5637', '4969', '3499', '5489', 'Z', 'K', 'M', 'I', 'Z', 'j']

Ex Output:
9845994396947365E7506a52517653N5041F15265118zA


Ex Input:
1, 3, ['4523', '3909', 'V', '7275', '5721', '6113', 'G', '5319', '3519']

Ex Output:
V90933254


Ex Input:
4, 19, ['1097', '1197', 'i', '3075', 'L', 'C', '6845', '167', 'f', '4833', '7775', 'i', 'u', 'a', '753', '8075', 'L', '9887', '8565']

Ex Output:

56587889L5708357aui57773384f7615486CL5703