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, 2, ['5111', 'U', '441', '8381']

Ex Output:
U1115


Ex Input:
1, 2, ['S', '411', '3257', 'c', '3483', 'i', 'h', 't']

Ex Output:
114S


Ex Input:
7, 22, ['8647', 'v', '8325', '85', 'a', '5791', '7445', '549', 'J', '1185', 'U', '2995', 'K', '4579', '1723', 'K', 'S', '3915', 'T', '5873', '4289', 'z', 'r', '8577', '4857', 'M']

Ex Output:

z98243785T5193SK32719754K5992U5811J9455447