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:
5, 20, ['5377', 'j', 'j', '1767', '2103', '9547', 'I', 'M', '4067', '2571', 'V', 'Z', 'O', '3421', 'V', 'v', '4919', 'X', '307', 'M', '1603']

Ex Output:
M307X4919vV3421OZV25714067MI95472103


Ex Input:
1, 5, ['h', 'L', '1237', 'N', 'a']

Ex Output:
aN1237Lh


Ex Input:
9, 16, ['i', 'x', 'L', '9409', 'Q', '8135', 'N', 'f', '6723', 'c', '375', 'f', 'K', '2869', '6249', '4671', 'Z', 'i', 'x', '3105', 'Z']

Ex Output:

467162492869Kf375c6723