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, 15, ['5997', '2005', '8529', 'j', 'T', '9729', 'T', 'm', '357', '779', '2253', '725', 'z', '4149', '2913', '8135', 'Q', 'B']

Ex Output:
31929414z5273522977753mT9279Tj925850027995


Ex Input:
2, 2, ['8679', 'G', '1819']

Ex Output:
G


Ex Input:
1, 8, ['9553', '8753', '7717', '2999', '9813', 'R', 'a', '3785', '475', 'h', '2333', 'B', '4971']

Ex Output:

5873aR31899992717735783559