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:
5, 8, ['g', 'a', '2875', '9581', '3263', '3103', 'J', 'b', 'h']

Ex Output:
bJ30133623


Ex Input:
4, 7, ['1247', 's', 'J', 'w', 'X', '7211', 'c']

Ex Output:
c1127Xw


Ex Input:
4, 8, ['3103', 'a', 'f', '5645', 'Z', 'Q', 'T', '1491']

Ex Output:

1941TQZ5465