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:
3, 5, ['z', 'w', 't', '3663', '9611', '3737', '4277']

Ex Output:
11693663t


Ex Input:
11, 18, ['W', '5215', 'G', '6229', 'z', 'R', 'e', 'U', '5847', 'L', '1587', '7287', 'a', 'S', '4887', 'B', 'F', 'h', '7409', '8297', 'h', 'N', 'E', '9925', 'B', 'l', '6091', '1345']

Ex Output:
hFB7884Sa78277851


Ex Input:
2, 15, ['7973', 'x', '6363', 'h', 'D', '4113', '2093', 'U', 'd', 'T', '7469', '3635', '5271', 'D', '1705', 'U', 'h', 'u']

Ex Output:

5071D172553639647TdU39023114Dh3636x