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:
10, 20, ['9695', 'I', '5457', 'M', 'V', '7993', 'B', 'b', 'u', 'H', '7805', '3431', '6839', '3687', '8261', 'U', 'a', 'W', '9437', 'q', 'l']

Ex Output:
q9437WaU82613687683934317805H


Ex Input:
3, 5, ['m', 'U', '3235', 'B', '2015']

Ex Output:
2015B3235


Ex Input:
5, 6, ['9165', 'z', '9855', 'p', '1419', 'Y', 'n', 'r', 'R', 'h', 'V', '361', '9757', '9869', '9091', 'C']

Ex Output:

Y1419