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:
9, 11, ['m', 'r', '5241', 'x', 'Q', 'f', '1167', '1869', '4753', 'g', 'y', 'M', '7109', '2177', 'h', 'K', '5481', '9731', 'u', 'K', 'E', 't', '4867', '4539', '7943', 'W']

Ex Output:
yg3574


Ex Input:
11, 15, ['807', '2753', 'L', '8633', '7203', 'j', 'a', 'r', 'R', 'q', 'g', 'B', 't', '1373', '3371', 'S', '9977', 'y']

Ex Output:
17333731tBg


Ex Input:
10, 12, ['a', 'y', '1619', 'Q', '8091', 'M', '6443', '6055', 'm', 'c', '879', 'w', 'F', '9611', 'k', 'C', '5101', 'E', 'j', '8223', '1499', 'e', 'e', 'H', '4453', 'F', 'R', 'E', '4543', 'J']

Ex Output:

w978c