In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

Ex Input:
12, 13, ['I', 'y', 'w', 'a', 'Q', 'f', '2619', 'q', 'e', '8477', 'm', 'C', '203', 'C', '7237', 'h', 'C', 'M']

Ex Output:
203C


Ex Input:
8, 9, ['u', 'Q', '8585', 'k', '4663', 'X', 'k', 'f', 'e', '8849']

Ex Output:
ef


Ex Input:
1, 6, ['i', 'A', '8715', 'U', 'x', 'N', '1785', '5899']

Ex Output:

NxU8715Ai