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:
3, 7, ['H', '689', 'd', '6759', '3531', 'd', '8393', 'N', 'd', 'o', '2377', '4065', '8021', 'c']

Ex Output:
3938d13539576d


Ex Input:
7, 8, ['9589', 'N', 'w', '429', '5545', '5047', '4133', 'p', 'a', '3793']

Ex Output:
p3314


Ex Input:
5, 16, ['807', 'N', '6491', '8017', '1595', '1331', '3469', 'd', '1597', '4565', 'o', 'K', '9489', 'I', '6787', 'T', '1297']

Ex Output:

T7876I9849Ko56547951d964313315951