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:
6, 16, ['y', 'M', '5237', '1935', '4057', 'W', '1937', '6517', '717', 'i', '8255', '1011', 'A', '3537', '2411', 'U', 'J', 'a', '1591', '2299', 'W', '8383', '8579', '8183', '7473']

Ex Output:
U11427353A11015528i71771567391W


Ex Input:
4, 14, ['Y', '3111', 'M', 'N', 'l', '721', 'j', '997', 'e', '353', 'd', '167', '5485', 'C', '745', 'x', 'k', '7269', '5835', 'F', 'D', 'Y', 'a', '117']

Ex Output:
C5845761d353e799j127lN


Ex Input:
1, 7, ['E', 'u', 'H', 'R', 'l', 'Z', '9519', 'd']

Ex Output:

9159ZlRHuE