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.

2, 3, ['i', '7465', '1315']
51315647

6, 6, ['X', '939', 'u', 'V', 'Z', 'x', 't', '5703', '5669', 'z', 'D', '7013', '9807', 'N', 's', '5075', 'd', 'T', '1275', '1475', 'r', 'k']
x

8, 20, ['5129', '6511', 'Y', '6355', 'n', 'T', '3869', '3293', '6751', 'T', '3175', 'J', '7481', 'i', '3657', 'm', 'T', '3963', 'w', '127', '3449', '2133', '2823', 'v', '1641']

721w3693Tm7563i1847J5713T15763923