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, ['J', '701', 'm', '8837', 'b', 'd', '5911', 'y', '8031']

Ex Output:
1195d


Ex Input:
10, 19, ['6733', 'q', '2197', 'h', '9975', '3059', 'e', '8475', '281', 'L', '9119', 'B', '8857', 'U', 'R', 'h', 'e', 'J', 'P', 'l']

Ex Output:
PJehRU7588B9119L


Ex Input:
2, 10, ['M', 'O', '147', '2789', 'b', '9553', '7613', 'Q', 'w', '5363', '1755', '5803', '1073', '7975', '1801', '6427', '2509', '9263', 'w', '9089', 'v', '7789', 'g', '415', '7293', '941']

Ex Output:

3635wQ31673559b9872741O