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:
3, 10, ['9543', '2797', '3939', '8207', '329', 'l', '5353', '8849', '5579', '7445']

Ex Output:
5447975594883535l92370289393


Ex Input:
13, 17, ['9729', '9795', '3087', '7313', 'L', '5303', '1953', '2173', '7355', '8423', 'd', '6427', '3645', 'w', '157', 'P', '7827', '6729', '8711', '9279', 'u', 'P', '1301', '8053', 'n']

Ex Output:

7287P751w5463