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:
3, 12, ['G', 'C', 'B', '3939', 'F', '8183', '1127', 'C', '4053', 'e', '6827', 'c', 'p', '4677', 'O', '3351', '5097', '7389']

Ex Output:
c6827e4053C11278183F3939B


Ex Input:
2, 13, ['P', 'U', 'k', '6209', 'y', 'P', '273', '3377', '5205', 'p', '1079', 'O', '2875', '1679', 'c']

Ex Output:
2875O1079p52053377273Py6209kU


Ex Input:
12, 12, ['3201', '9485', 'B', '2803', '5209', 'I', '9123', '4809', 'T', 'K', 'x', 'k', 'n', '7167', '3983', '6061', 'v', 'r']

Ex Output:

k