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:
4, 12, ['I', 'G', 'u', 'S', '9615', 't', 'p', 'P', 'R', 'v', '8819', '5379', 'I', '1165', '4545', '3117', '1577', 'y', 'W', 'R', 'O']

Ex Output:
97359188vRPpt5169S


Ex Input:
2, 4, ['5983', 'I', '9531', 'U', 'P', '1383', 'Y']

Ex Output:
U1359I


Ex Input:
4, 10, ['5181', 'G', 'I', 'H', '9001', '1123', '749', 'C', '2761', '6813', 'c', 'u', '6319', '3627', '2957', 'j', 'n', '7473', 'l', '8811', 'q']

Ex Output:

31861672C94732111009H