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, ['7319', 'U', 'Z', '1163', '8123', '4861', '117', '3893', '2489', 'S', '1511']

Ex Output:
16843218


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

Ex Output:
M1015482


Ex Input:
2, 3, ['v', '8409', '1587', 'l']

Ex Output:

78519048