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:
7, 9, ['w', 'L', '7649', 's', 'D', '45', 'L', 'O', 'H', '2781', '6883', 'h']

Ex Output:
HOL


Ex Input:
7, 8, ['U', 't', '8289', '9391', '1751', 'Y', '9319', 'A', 'Q', 'd', 'B', '2521', '2455']

Ex Output:
A9139


Ex Input:
1, 23, ['7243', '5151', '2897', 'O', 'g', 'S', '8181', 'G', '5001', '9837', '9937', 'K', '3247', 'l', '5265', 'X', '117', '8207', 'Z', '6137', 'E', '8319', 'm', 'f']

Ex Output:

m9138E7316Z7028711X5625l7423K739973891005G1818SgO798215153427