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:
10, 11, ['6929', 'l', '8541', 'L', '7495', '7707', '8839', '6687', 'L', '5125', 'd', 'F', '7', '4357', 'w', 'R', '2459', '9871', 'E', '299', '5967', 'T']

Ex Output:
d5215


Ex Input:
2, 5, ['Y', 'O', 'Q', 'l', 'E']

Ex Output:
ElQO


Ex Input:
4, 4, ['5307', 'x', '3755', 'U', '2905', '5445', 'w', '3355', 'Z', 'u', 'q', '3129', '8647', '2847', '6189', 'i', 'q', '7749', 'P', '473', '6081', 'G', '2333']

Ex Output:

U