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, ['4101', '9767', 'q', 'Z', '6853', '3643']

Ex Output:
q76791014


Ex Input:
1, 6, ['7675', '2039', 'u', 'w', '8039', 'e', 'q']

Ex Output:
e9308wu93025767


Ex Input:
5, 8, ['1861', '2831', '6423', '9641', 'o', 'J', '8215', '4149', '5345', '4371', '7747']

Ex Output:

94145128Jo