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:
5, 6, ['q', 'L', 'f', '391', '7601', '2925', 'i', 'C', '4787']

Ex Output:
52921067


Ex Input:
5, 7, ['6005', 'y', '5057', '7865', '2845', '101', 'M', 'd']

Ex Output:
M1015482


Ex Input:
9, 16, ['1375', '7295', '5659', 'Q', 'r', 'R', 'n', 'N', 'Q', '71', 'u', '2533', '8953', '217', 'v', 'O']

Ex Output:

Ov71235983352u17Q