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:
2, 3, ['X', '8243', '1209']

Ex Output:
90213428


Ex Input:
1, 1, ['4571', '3997']

Ex Output:
1754


Ex Input:
1, 8, ['1905', 'f', '1581', 'A', '3691', '7185', '7181', 'l', 'c', 'U', 'T', 'w', 'M', 'T', 'I', '1315', 'x', 'j', 'n', 'e']

Ex Output:

l181758171963A1851f5091