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, ['n', '1995', '9023', '6583', 'e', '1551', '1189', '451', 'I', '9021', '9823', '2777', 'u', '9695', 'p', 'C', '3255', '79', '6763', 'a']

Ex Output:
277798239021I45111891551e65839023


Ex Input:
12, 18, ['N', '9555', 'H', 'd', '7941', 'U', '1965', 'G', 'E', '6947', 'q', '2341', '7909', 'n', '8625', 'r', 'M', 'F']

Ex Output:
FMr8625n79092341


Ex Input:
21, 29, ['8715', 'o', 'F', '1049', 'j', 'N', 'u', 't', 'o', '3513', '4271', 'i', 'C', '8809', '3203', 'v', 'p', '1387', 's', 'W', '9849', '5805', 'Q', '2519', 'w', 'Q', '9267', 'R', '5407', 'X']

Ex Output:

5407R9267Qw2519Q58059849