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, 3, ['9937', 'F', 'g', 'B', 'M', 'x', 'n', 'V', '4241', 'Z']

Ex Output:
gF7399


Ex Input:
21, 24, ['t', '1315', '1977', '8701', 'w', '2899', '9389', 'c', 'F', '2949', '9591', 'Y', '3127', '5887', 'D', '6527', 'I', '3229', '6585', '5375', '6289', 'j', '1775', 'n', 'O', '4741']

Ex Output:
n5771j9826


Ex Input:
4, 11, ['w', 'X', 't', '4093', 'w', '5583', '5767', 'v', '1903', '4921', '8549', 'M', 'p', '803', '7599', 'P']

Ex Output:

945812943091v76753855w3904