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, 5, ['d', 'p', 'B', 'i', '5865', '4569']

Ex Output:
5685iBpd


Ex Input:
4, 4, ['u', 'Z', 'e', '253', '2663', 'q', '8421', '2509', '2831', 'H']

Ex Output:
352


Ex Input:
3, 15, ['4865', 'U', 'q', 'C', 'f', 'f', 's', 'y', '2535', 'u', '5163', 'Y', '3673', '8855', 'H', '3839', '6835', '4149', '6001', '4113', '5793', 'Q', '2957', '2173', '7421', 's', '1607']

Ex Output:

H55883763Y3615u5352ysffCq