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, 7, ['E', 'A', 'd', 'a', 'S', '851', '8465', '3205', '5169', '7097', '1679', '3875', 'B', '4761']

Ex Output:
5648158


Ex Input:
4, 4, ['Z', '7465', 'J', 'W']

Ex Output:
W


Ex Input:
1, 18, ['6931', '1137', 'P', 'd', '2721', 'M', '1295', 'F', 'm', '3', '8783', '3841', 'd', 'Z', '7473', 'K', 'm', 'J', 'j', 'G', '8411', '9683', '8187', 'A', '345', '1797', 'E', '5915', '1393', 'P']

Ex Output:

JmK3747Zd148338783mF5921M1272dP73111396