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:
6, 8, ['y', 'g', 'I', '7137', '1589', '6209', '9823', '4543', '8683', 'L', 'H', '1937', 'R', 'c', 'E', 'l', '4221', '7981']

Ex Output:
454398236209


Ex Input:
8, 18, ['O', 'a', 'w', 'f', 'E', 'u', '1205', '3349', '9805', 'M', 'Z', '5239', 'u', '203', '9193', '8629', '3209', 'v', 'b', '9661', '1039', '251', '1863', 'b']

Ex Output:
v320986299193203u5239ZM98053349


Ex Input:
3, 5, ['Z', 'E', '3459', '3809', 'F', '9965', '6599']

Ex Output:

F38093459